Use substitution to solve for Y in the system of equations.

2x-2y=20
4x+y=20

A.-4
B.-6
C.0
D.4

Question

Use substitution to solve for Y in the system of equations. 

2x-2y=20
4x+y=20

A.-4
B.-6
C.0
D.4

anonymous · Answer

I will give medals!!!

kidrah69 · Answer

isolate the equation 2 since it has a y inly new equation would be
y=-4x+20
now sub it ibot equation 1 and solve.
2x-2(-4x+20)=20

kidrah69 · Answer

*into

anonymous · Answer

Thank you!

kidrah69 · Answer

oo we are not done yet!! ;-; this will only find our x value :) I want you to solve the equation I gave you find the x value

kidrah69 · Answer

2x+8x-40=20
 combine like terms.
10x=20
10/10=0
20/10/?
once you find the x value plug it into equation 2 :)
y=-4(x value goes here)+20
y=?
there you go thats all there is :) welcome to openstudy!

anonymous · Answer

Thank you! But I already did haha. I am not stupid lol