Вопрос пользователя:
1) 5*(x-7)=3*(x-4)-27 2) 3x+2*(2x-3)=8-7*(x-2)
Илюха отвечает:
5х-35=3х-12-27
5х-3х=-12-27+35
2х=-4
х=-2
3х+4х-6=8-7х+14
3х+7х+4х=8+6+14
14х=28
х=2
1) 5*(x-7)=3*(x-4)-27 2) 3x+2*(2x-3)=8-7*(x-2)
5х-35=3х-12-27
5х-3х=-12-27+35
2х=-4
х=-2
3х+4х-6=8-7х+14
3х+7х+4х=8+6+14
14х=28
х=2