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-3y-15=12 what does y equal

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What is x-3y=-12, 4x+6y=-12 in elimination ?


then x = 3y-12, then 4(3y-12) +6y=-12, then (12y-48)+6y=-12, then 12y-48+6y=-12, then 18y=36, then y=2. x=3y-12, x=3(2)-12, x=6-12, x=-6.

Mar 05, 2015 | Office Equipment & Supplies

1 Answer

What ia the sulution of 3y-6x=-3


To find the solution, first find the value of y for each equation.
Then substitue one equation into the other so that you only the x variable left.
Then just solve for x.
Once you have a value for x, then you can easily solve for y.


So for the first equation:

3y - 6x = -3
3y = 6x - 3

y = 2x - 1


Now for the second equation:

2y + 8x = 10
2y = -8x + 10

y = -4x + 5

Since both equations equal y, they also equal each other, therefore:

2x - 1 = -4x + 5

Now just solve for x:

2x + 4x = 5 + 1
6x = 6

x=1

Now substitute x=1 into either original equation:

y = 2x - 1
y = 2 (1) - 1
y = 2 - 1

y = 1


Therefore the solution is x=1 and y=1



Good luck, I hope that helps.


Joe.

Nov 09, 2011 | Texas Instruments TI-84 Plus Silver...

1 Answer

(2x+3y)(3x+2y)


(2x - 3y)(3x + 2y) = 2x*3x + 2x*2y - 3y*3x - 3y*2y
= 6x^2 + 4xy - 9xy - 6y^2
= 6x^2 - 5xy - 6y^2 You multiply each element in the first set of brackets by each element in the second set of brackets and then consolidate like terms and arrange them in sequence of powers, first x and then y. So:
2x by 3x = 6x squared
2x by 2y = 4xy
-3y by 3x = -9xy
-3y by 2y = 6y squared

6x squared -5xy + 6y squared

Dec 04, 2010 | Yahoo Computers & Internet

1 Answer

Intermediate algebra x= 3y+5 x= (3/2)y


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


Sep 28, 2010 | Computers & Internet

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

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

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