5x+6y=15 y=-4x-7 To solve this, I would first substitute -4x-7 for y 5x+6(-4x-7)=15 Then distribute the terms in the 6(-4x-7) part 5x+-24x-42=15 Then simplify -19x-42=15 Then add 42 to both sides -19x=57 Divide -24 to both sides x=57/-19 or -3 Then y=-4(-3)-7 y=12-7 y=5
