20БАЛЛОВ!!! За 2 уравнения!!!!
1)Х+1 7/9= 1/6 2)-7/15:У= -0.2

1) х+1 7/9=1/6х=1/6-1 7/9х=9/54-1 42/54х=9/54-96/54х=-87/54х=-1 33/54х=-1 11/182)-7/15:у=-0,2-0,2у=-7/151/5у=7/15у=7/15:1/5у=7/15*5/1у=7/3у=2 1/3