18х=4,2+4х
33х=56-7х
19х+36=37х

1) 18х=4.2+4х18х-4х=4,214х=4,2х=0,32)33х=56-7х33х+7х=5640х=56х=1,43)19х+36=37х19х-37х=-36-18х=-36х=2

a)18x-4x=4,214x=4,2x=4,2/14x=0,3б)33x=56-7x33x+7x=5640x=56x=1,4в)19x-37x=36-18x=36-x=2x=-2