(8х-2)+30х:5х=12 помогите
(8х - 2) + 30х:5х= 12 (8х - 2) + 6х = 12 8х - 2 + 6х = 12 2х = 14 х = 14:2 х = 7
(7Х+5)+2Х+31=54 помогите еще
(7х+5) + 2х + 31 = 54
7х + 5 + 2х + 31 = 54
9х = 18
х = 18:9
х = 2
(8х-2)+30х:5х=12 8х-2+30х:5х=12 8х-2+6х=12 8х+6х=12+2 14х=14 х=14:14 х=1