2x+2y=36 3x-3y=36 Rozwiąż układ równań

2x+2y=36 3x-3y=36 2x = 36 - 2y |:2 x = 18 -y 3( 18 -y) -3y=36 54 -3y -3y=36 -6y = - 18 |:-6 y = 3 x =18-3 = 15 x=15 y=3

2x+2y=36/:2 3x-3y=36/:3 x+y=18 x-y=12 x=18-y 18-y-y=12 -2y=12-18 -2y=-6 y=6:2 y=3 x=18-3=15 odp. x=15 y=3 spr. 2×15+2×3=36 30+6=36 36=36 3×15-3×3=36 45-9=36 36=36