19) 5х+ 3 = 4х +22 20) 2 + 2х = х +24 21) 5 + 7х =26 + 6х
19) 5х+ 3 = 4х +22~5x-4x=22-3~x=19
20) 2 + 2х = х +24 ~2x-x=24-2~x=22
21)5 + 7х =26 + 6х~7x-6x=26-5~x=21
5х+3=4х+22 5х-4х=22-3 х=19 2+2х=х+24 2х-х=24-2 х=22 5+7х=26+6х 7х-6х=26-5 х=21