Question

Without substituting
x+2y=7
-x+y=-4

Answer 1

Without substituting, the answer to your question is 15y - 4

How to solve: Combine like terms.

Step 1: x + 14y + -x + y + -4

Step 2: (x+ -x) + (14y +y) + (-4 )

Step 3: 15y + -4