Răspuns :
a) 5x-3=3x+11 5x-3x=11+3 2x=14 | :2 x=7 b)-2x+15=-3x=9 -2x+3x= 9-15 x=6 c)4x+13=3x+15 4x-3x=15-13 x=2 d)-43-17x=-9-16x -16x+17x=-9+43 x=34