## Algebra 1: Common Core (15th Edition)

To solve 2x - y = -3 (x - y = 1 )$\times$ -1 2x - y = -3 -x +y = -1. --> add the two equations x = -3-1 x = -4 To solve for y 2(-4)-y =-3 -8 -y =-3 -y = -3+8 -y = 5 y =-5