Question

Solve the system of equation 2x+3y=40 and -2x+2y=20

a. x=-6,y=4

b.x= 2 y=12

c. x=10,y=20

d.x=-10,y=20

Answer 1

2x+3y=40
-2x+2y=20
5y=60
***y=12***

2x+36=40
***x=2***

Answer 2

Hi Daniellepowers!

To solve this system of equations, add the two equations.
2x+3y=40
+
-2x+2y=20
=
5y=60
y=12

Plug y back into any equation,
2x+3(12)=40
2x+36=40
2x=4
x=2

Solution: (2, 4)

B. x= 2 y=12

Hope this helps :)