How do you solve x + 3y = -7 and -x + 2y = -8?
1 Answer
Sep 10, 2015
So the answered is x = 2 and y = -3
Explanation:
In order to solve x + 3y = -7 and -x + 2y = -8, you must use the elimination method for solving linear equations.
In this case, you will have to find y and x.
We will have to line them up like this
x + 3y = -7 As you can see, the easiest one to solve for is y
+ ( -x + 2y = -8) because you could cancel the x
_________
5y = -15
y = -3
Now you plug y back to any of the of the linear equation.
lets choose x + 3y = -7
x + 3(-3) = -7
x - 9 = -7
x = 2
If you plug x and y back to the linear equation, you should get the answered
So the answered is x = 2 and y = -3