Question

How can x + 8 = -x + 7 be set up as a system of equations?

Answer 1

set each side equal to y

y = x+8
y = -x+7

Answer 2

to get back to x + 8 = -x + 7, you would...


y = -x+7 start with the second equation

x+8 = -x+7 ... replace y with x+8 (works because y = x+8)