-=x--1
25х-6(1-3х)=30х-2(х-7)-30
25х-6+18х=30х-2х+14-30
43х-6=28х-16
43х-28х=-16+6
15х=-10
х=-0,6
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-=x--1
25х-6(1-3х)=30х-2(х-7)-30
25х-6+18х=30х-2х+14-30
43х-6=28х-16
43х-28х=-16+6
15х=-10
х=-0,6