X=25-y

4(25-y) + 5y=56

100-4y+5y=56

100+y=56

y= -44

x=25+44=69

x=69 y= -44

Posted on Aug 22, 2008

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Posted on Jan 02, 2017

solution is:

x-5y = 20

-5y = 20-x

5y = x-20

y = (x-20) / 5

x-5y = 20

-5y = 20-x

5y = x-20

y = (x-20) / 5

Dec 14, 2015 | Office Equipment & Supplies

Multiply 7 x 8 to give 56. !

emily, is this a trick question?

emily, is this a trick question?

Dec 27, 2014 | The Learning Company Achieve! Math &...

This is best written as two separate equations:

8x+3y = -23 and 34x+ 5y = -23

Solving the first one for x:

8x = -23-3y

x = -23/8 - 3/8y

Substituting this value for x into the second equation:

34(-23/8 - 3/8y) + 5y = -23

-97.75 - (34)(.375)y + 5y = -23

-97.75 - 12.75y + 5y = -23

-97.75 -7.75y = -23

-7.75y = 97.75-23=74.75

**y **= -74.75/7.75 =** -9.645161**

Substitution back into the equation for x:

x = -23/8 - 3/8(-9.645161)

x = -2.875 + 3.616935

**x** **=.741935**

8x+3y = -23 and 34x+ 5y = -23

Solving the first one for x:

8x = -23-3y

x = -23/8 - 3/8y

Substituting this value for x into the second equation:

34(-23/8 - 3/8y) + 5y = -23

-97.75 - (34)(.375)y + 5y = -23

-97.75 - 12.75y + 5y = -23

-97.75 -7.75y = -23

-7.75y = 97.75-23=74.75

Substitution back into the equation for x:

x = -23/8 - 3/8(-9.645161)

x = -2.875 + 3.616935

Dec 12, 2014 | Bagatrix Algebra Solved! 2005 (105101) for...

First of all you equation is not one : it has nothing on the right side of the = sign. But to answer the general question let us write the equation as **50+25x-5y=0**

**X-intercept (also know as roots) There may be several**

Definition: X-intercepts are those values of the independent variable x**for which y=0**. For a straight line there con be at most 1 x-intercept.

To find the intercept, set y=0 in the equation of the line and solve for x

50+25x-5(0)=0 or 50+25x=0. The solution is** x=-(50/25)=-2**

**Y-intercept (also know as the initial value.** There can only be 1 y-intercept, otherwise the expression does not represent a function.

Definition: It is the value of the dependent variable y when x=0 (where the function crosses the y-axis

To find it, set the x-value to 0 in the equation of the line.

**50+25x-5y=0**

50+25(0)-5y=0, or 50-5y=0. The solution is**y=50/5=10**

The straight line cuts the x-axis at the point (-2, 0) and the y-axis at the point (0,10)

Definition: X-intercepts are those values of the independent variable x

To find the intercept, set y=0 in the equation of the line and solve for x

50+25x-5(0)=0 or 50+25x=0. The solution is

Definition: It is the value of the dependent variable y when x=0 (where the function crosses the y-axis

To find it, set the x-value to 0 in the equation of the line.

50+25(0)-5y=0, or 50-5y=0. The solution is

The straight line cuts the x-axis at the point (-2, 0) and the y-axis at the point (0,10)

Jan 28, 2014 | Computers & Internet

Write the equality in the form y=(5X+3)/(4X-5). Insert parentheses to ensure a correct result.

- Multiply both sides of the equality by (4X-5). This gives (4X-5)y=(5X+3).
- Open the parentheses as 4Xy-5y=5X+3
- Subtract 5X from both sides 4Xy-5y-5X=5X-5X+3
- Add 5y to both sides 4Xy-5X-5y+5y=5y+3 or 4Xy-5X=5y+3
- Factor the X on the left side X(4y-5)=5y+3
- If 4y-5 does not vanish, you can isolate X by dividing both members of the equality by (4y-5).
- You get X=(5y+3)/(4y-5)=f(y)

Jun 24, 2012 | Mathsoft StudyWorks! Mathematics Deluxe...

Is this a maths school problem?

You need to use algebra -

2x + 5y = 232 (heena has a number of 2 and 5 coins in her purse which add up to 232)

x + y = 80 (heena has x number of 2 and y number of 5 coins which tally to 80)

therefore, x = 80 - y

so going back to first equation, 2(80 - y) + 5y = 232

160 - 2y + 5y = 232

3y = 72

y = 24

and going back to x, x = 80 - y

x = 80 - 24

x = 56

so heena has 56 rs 2, and 24 rs 5. So the answer is 24.

You need to use algebra -

2x + 5y = 232 (heena has a number of 2 and 5 coins in her purse which add up to 232)

x + y = 80 (heena has x number of 2 and y number of 5 coins which tally to 80)

therefore, x = 80 - y

so going back to first equation, 2(80 - y) + 5y = 232

160 - 2y + 5y = 232

3y = 72

y = 24

and going back to x, x = 80 - y

x = 80 - 24

x = 56

so heena has 56 rs 2, and 24 rs 5. So the answer is 24.

Jan 26, 2011 | Computers & Internet

We can solve this
problem by taking digit by digit.

First and second digit,both are increased by 1,respectively

34…,45…,56…,67…,78…,89…

Third and fourth are the multiplication of first and second digit

3 x 4 = 12

4 x 5 = 20

5 x 6 = 30

6 x 7 = 42

7 x 8 = 56

8 x 9 = 72

so now the series become

3412.,4520.,5630.,6742.,7856.,8972.

Last digit equivalent multiplying the third and fourth digit:

1 x 2 = 2

2 x 0 = 0

3 x 0 = 0

4 x 2 = 8

5 x 6 = 30

7 x 2 = 14

so now the series become

34122,45200,56300,67428,785630,**897214**

First and second digit,both are increased by 1,respectively

34…,45…,56…,67…,78…,89…

Third and fourth are the multiplication of first and second digit

3 x 4 = 12

4 x 5 = 20

5 x 6 = 30

6 x 7 = 42

7 x 8 = 56

8 x 9 = 72

so now the series become

3412.,4520.,5630.,6742.,7856.,8972.

Last digit equivalent multiplying the third and fourth digit:

1 x 2 = 2

2 x 0 = 0

3 x 0 = 0

4 x 2 = 8

5 x 6 = 30

7 x 2 = 14

so now the series become

34122,45200,56300,67428,785630,

Mar 05, 2010 | Mathsoft StudyWorks! Middle School Deluxe...

It is solved by writing an equation

If the shorter piece is y cm, then the the longer piece would be 4y which is four times the shorter length. The total of these 2 together is 2meters or 200 cm, Now write the equation (2 pieces together is 200cm)

y + 4y = 200

5y =200

y =40

Since we have taken the lengh of shorter piece as y,

Shorter piece=40 cm OR 0.4m

Longer piece =160cm OR 1.6m

I have written the steps in detail for you to understand the process

Good luck

luciana44

Longer piece= 160cm

If the shorter piece is y cm, then the the longer piece would be 4y which is four times the shorter length. The total of these 2 together is 2meters or 200 cm, Now write the equation (2 pieces together is 200cm)

y + 4y = 200

5y =200

y =40

Since we have taken the lengh of shorter piece as y,

Shorter piece=40 cm OR 0.4m

Longer piece =160cm OR 1.6m

I have written the steps in detail for you to understand the process

Good luck

luciana44

Longer piece= 160cm

Feb 28, 2010 | Mathsoft StudyWorks! Middle School Deluxe...

Go to your matrix button and enter a "3x4" matrix.

Then enter it as follows:

-3 4 5 7

4 3 2 9

-5 5 3 -10

Then exit out and go to "2nd->matrix->math->rref(". Then press enter.

Your screen should look like this:

rref(

Then go to matrix and select your 3x4 matrix, press enter and close it with a parathesis. Your screen should look like this:

rref([A])

Press enter and the screen should say this:

1 0 0 2

0 1 0 -3

0 0 1 5

So,

x=3

y=-3

z=5

Hope this cleared up the confusion!

SJ_Sharks

Then enter it as follows:

-3 4 5 7

4 3 2 9

-5 5 3 -10

Then exit out and go to "2nd->matrix->math->rref(". Then press enter.

Your screen should look like this:

rref(

Then go to matrix and select your 3x4 matrix, press enter and close it with a parathesis. Your screen should look like this:

rref([A])

Press enter and the screen should say this:

1 0 0 2

0 1 0 -3

0 0 1 5

So,

x=3

y=-3

z=5

Hope this cleared up the confusion!

SJ_Sharks

Mar 03, 2009 | Texas Instruments TI-84 Plus Calculator

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