Решите уравнение и выполните проверку:
a) 

б)(3х-1,2)*7=10,5;

в)

 

Решите уравнение:

а)-5*(3а+1)-11=-16;

б)-3,2n+4.8=-2*(1,2n+2,4);

в)-5*(0.8z-1,2)=-z+7,2.

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