5x + 2y = 8
x + y = 4

If you want to solve the system of equations by addition, which of the following could you do?

Multiply the second equation by 5 and add.
Multiply the second equation by 2 and add.
Multiply the second equation by -2 and add.

Question

5x + 2y = 8
x + y = 4

If you want to solve the system of equations by addition, which of the following could you do?


Multiply the second equation by 5 and add.
Multiply the second equation by 2 and add.
Multiply the second equation by -2 and add.

anonymous · Answer

Multiply the second equation by -2 and add.

wolf1728 · Answer

Yes multiply 
x + y = 4 by -2 then add
So we have 
-2x -2y = -8 which we add to 
5x + 2y = 8

wolf1728 · Answer

Which produces x =0 
Now, can you solve for y?