Question

How to make y=-9x+8 and y=8x-9 equal

Answer 1

To make y=-9x+8 equivalent to y=8x-9 x will have do 8x-9=-9+8

Combine like terms or try get everything on one side.

which is -9x=8x-17 then

you need to divide i think

x=1 ok x=1