6x-2 (-11+4x)=13 6x+22-8x= 13 -2x=13-22 -2x=-9:(-2) x=4,5 4×4,5-y=11 -y =11-18 -y=-7:(-1) y=7 {y-x=20 {2x-15y=-1
6x-2 (-11+4x)=13 6x+22-8x= 13 -2x=13-22 -2x=-9:(-2) x=4,5 4×4,5-y=11 -y =11-18 -y=-7:(-1) y=7 {y-x=20 {2x-15y=-1