2x+y=9 5x-4y=3

8x + 4y= 36 5x-4y=3 13y=39 y=3 8x=36-12 8x=24 x=3

2x+y=9 5x-4y=3 y=9-2x 5x- 36+8x=3 13x=39 x=3 y=9-2*3 y=9-6 y=3