7х-9/12=35/84 2х+7/17
=60/68

спасибо

7х - 9/12 = 35/84588х - 63 = 35588х = 63 + 35588х = 98х = 98/588х = 1/6

1)7х-9/12=35/847х=35/84+9/127х=(35+9*7)/847х=98/84х=98/84:7х=98/84*1/7х=14/84х=1/62)2х+7/17=60/682х=60/68-7/172х=(60-28)/682х=32/68х=32/68:2х=32/68*1/2х=16/68х=4/17