x+12/9-х-1/6=х+1/3
(х+12)÷9-(х-1)÷6=(х+1)÷3
(х+12)÷9-(х-(-х))÷6=(1+1)÷3
(х+12)÷9-(-2х)÷6=2/3
х÷9+12/9+1/3х=2/3
х+12/9+1/3х=2/3×9
4/3х+12/9=6
4/3х=6-12/9
4/3х=4 2/3|÷4×3
х=7/2
х=3,5
