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Intermediate algebra x= 3y+5 x= (3/2)y - Computers & Internet

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Hi,
x = 3y + 5 and x = 3y/2
Then
3y = 6y +10
y = -10/3
x = - 5


Posted on Mar 25, 2011

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1 Answer

8x + 3y = 3 4x + 5y = -23


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

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

1 Answer

-6x-3y=27


The x intercept is where your line will cross the x axis. Therefore, the value for y at this point is 0. Substitute 0 for y in this equation and solve for x.

6x + 3(0) = 27
x = 27/6
x = 4 1/2

x intercept = (4 1/2, 0)

Follow the same reasoning for the y intercept.

6(0) + 3y = 27
y = 27/3
y = 9

y intercept = (0,9)

Now plot these two points and draw your line through them.

May 18, 2012 | SoftMath Algebrator - Algebra Homework...

1 Answer

Algebra equations


This is very basic scientific calculator and you cannot use it with variables.
As to your equation (if you want to solve it) it is much simpler to do so with pen and paper.

Write it as
3y-6=-7y +4
Take the 6 from the left to the right where it becomes +6, Thus
3y=-7y+4+6
3y=-7y+10

Take the -7y term from the right to the left side, where it becomes +7y
3y+7y=10 or 10y=10.
The solution is clearly y=1.

Mar 03, 2010 | Texas Instruments TI-30XA Calculator

2 Answers

How do I solve x and y in the following equations? 5x+3y=6 2x-4y=5 Thank you


You can solve it with following method.

5x+3y=6 2x-4y=5
So 5x=6-3y so 2[(6-3y)/5]-4y=5
So x=(6-3y)/5 so 12-6y-20y=25
so -26y=25-12
so -26y=13
so y= -(1/2)
2x-4y=5
so 2x=5+4y
so 2x=5+4(-1/2)
so 2x=(10-4)/2
so 2x=6/4
so x =3/2

The value of x=3/2 and value of y= -1/2

Let me know if you need further assistance.
Thanks for using FixYa.

Mar 03, 2010 | Office Equipment & Supplies

1 Answer

How would I do an equation such as -2x(-2x + 3y) how would I type that into calculator


I am sorry to be the messenger with bad news, but this calculator does not do symbolic algebra. It does not have a solve function either.
You do have 5 memory variables in which you can store numerical values but it will not do you any good in this particular case.

Anyway, there is nothing you can do with such an expression (IT IS NOT an equation, just an expression) , except some cosmetic change 2x(2x-3y) or expand it 4x^2-6xy.

Feb 11, 2010 | Texas Instruments TI-34II Explorer Plus...

1 Answer

Gr 8 question


The two numbers are 9 and 27.

Solution:
Suppose the two numbers are x and y, then,

x + y = 36 ---------1
and
x = 3y -------------2

Solving equation 1 and 2...

3y+y=36 => 4y=36 => y = 9
x + 9 = 36 => x = 27

Please rate and comment if my answer is right.

Jan 31, 2010 | SoftMath Algebrator - Algebra Homework...

2 Answers

X-3y=5 3x-2y=1


2y - x = 3
x = 3y - 5

Add the two equations side by side,

2y - x + x = 3 + 3y - 5

2y = 3y - 2

y = 2

Plug this in the second equation to get x,

x = 3(2) - 5

x = 1

So the solution is x = 1, y = 2

or in ordered pair notation (1, 2)

Jun 29, 2009 | Computers & Internet

2 Answers

Factoring polynomials "Algebra"


Mode>choose "5"
choose equation format "4"
input the coefficient for a which is "1" and hit "="
input the coefficient for b which is "4" and hit "="
input the coefficient for c which is "3" and hit "="
input the coefficient for d which is "12" and hit "="
Hit "=" for X1
Hit "=" again for X2
Hit "=" again for X3

Nov 18, 2007 | Casio Office Equipment & Supplies

5 Answers

Algebra 1


B. 2((2-Y)/3)-Y=3
2(2-Y)-Y=9
4-2Y-Y=9
-3Y=9-4
-3Y=5
-Y=5/3
Y=-1.67

A. 3X+(-1.67)=2
3X-1.67=2
3X=2+1.67
3X=3.67
X=3.67/3
X=1.22

Nov 05, 2007 | SoftMath Algebrator - Algebra Homework...

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