Question

how do you find (y) from this equation 2x-y=-13 y+3x=-12

Answer 1

First solve one of them for x, then plug in the expression you found into the other one for x and solve for y.

Answer 2

first, add y to both sides to get 2x=y-13 then add 13 to both sides to get 2x+13=y

Answer 3

for the second one do the same kind of thing, except just subtract 3x from both sides to get y=-12-3x

Answer 4

2x-(-3x-12)=-13
2x+3x+12=-13
5x=-25
x=-5
y-15=-12
y=3

Answer 5

I solved 2x-y=-13 but not exactly sure if i got it right? The (y) i got for it was y=13-2x

Answer 6

Hope i dont confuse things but i think elimination is much simpler for this problem:
Add equations together
2x - y = -13
3x +y =-12
_____________
5x + 0 = -25
divide by 5 on both sides
x = -5
substitute back into original equation
2(-5) -y = -13
-10 - y = -13
Add 10 to both sides
-y = -3
Flip signs
y = 3

Answer 7

If you are trying to find y, you first need to find x in terms of y from one equation, then plug it in. Or you can use elimination as cow suggests.

Answer 8

Its asking to use the graph to solve the linear sytem. Then to check solution.

Answer 9

find the point where the 2 lines intersect, that is the solution
check by substituting in the x,y values into one of the equations of the line

Answer 10

okay now that makes more sense. thank you.