Question

What would step 3 look like after you have added the two equations?

Answer 1

$\begin{gathered} 8x-10y=20 \\ -8x-6y=-4 \\ -16y=16 \end{gathered}$

Adding the two equations will be adding similar terms to both equations. That is:

8x + (-8x) = 0

-10y + (-6y) = -16y

20 + (-4) = 16

Therefore, adding the two equations will look like -16y = 16. (Option 3)