Решите уравнение 3(х+6)=3-х,5/7х-3/14= -2

Расскроем скобки:
3х+18=3-х
3х+х=3-18
4х=-15
х=-15/4
х=-3 3/4 или х=-3,75

5/7х-3/14=-2
5/7х=-2+3/14
5/7х=-1 11/14
х=-1 11/14÷5/7
х=-25/14×7/5
х=-5/2=-2 1/2 или х=-2,5

3(х+6)=3-х
3х+18=3-х
3х+х=3-18
4х=-15
х=-15:4=-3,75

5/7х-3/14=-2
5/7х=-2+3/14
5/7х=-25/14
х=-25/14:5/7=-25/14*7/5
х=-2,5