Ответ Автор - sssunshine х-3(1-7х)=2х+2х-3+21х=2х+220х=5х=42.-9х-9(4-х)=3х+3-9х-36+9х=3х+3-3х=39х=-133.5х-6(5+2х)=х-25х-30-12х=х-2-7х=28х=-44.9х-2(-1-х)=х-59х+2+х=х-59х=-7х=-7/9