{2x+3y=4 {8x-5y=-1

{2x+3y=4/*-4 {8x-5y=-1 -8x-12y=-16 8x-5y=-1 -8x+8x-12y-5y=-17 -17y=-17 y=1 2x+3=4 2x=1 x=1/2

2x+3y=4 I* -4 8x-5y=-1 -8x-12y=-16 8x-5y=-1 ___________ -17y=-17 y=1 8x-5=-1 y=1 8x=4 y=1 x=2/4 y=1