Помогите решить уравнения ( решение тоже писать): а) -3(х+2х)-4(6+1)=8
б)-2(-3х+х)+2(4-7)=-2х
в)6(х-3)-2(3-х)=64
г)3,1(2х+0,2)-6,3(х-2)=14,7
д)х(х-3)=0
е)4х(2х-6)=0
ж)-х(7х+19)=0
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