Question

Find the solution to the equations.

2x - y = -3
x + y = 0
( ? ),( ? )

Answer 1

The easiest way to solve a problem like this is to solve one equation for one of the variables, say x. Then whatever you get x equal to, substitute that into the x in the other equation and solve it.

Answer 2

2x - y = -3
x + y = 0
y=-x
2x-(-x)=-3
3x=-3
x=-1
y=1

Answer 3

So x+y = 0 gives you
x = -y

substituting into the first equation gives
2x-y = -3
2(-y) - y = -3
-3y = -3
y = 1

Then just substitute that y value into the second equation and solve for x.
x+y = 0
x + 1 = 0
x = -1.

So x = -1, y = 1 is your solution.

Answer 4

thank you!