7х-9/12=35/84 2х+7/17 =60/68

7х - 9/12 = 35/84 588х - 63 = 35 588х = 63 + 35 588х = 98 х = 98/588 х = 1/6

1)7х-9/12=35/84 7х=35/84+9/12 7х=(35+9*7)/84 7х=98/84 х=98/84:7 х=98/84*1/7 х=14/84 х=1/6 2)2х+7/17=60/68 2х=60/68-7/17 2х=(60-28)/68 2х=32/68 х=32/68:2 х=32/68*1/2 х=16/68 х=4/17