-7(a-1)=3(4a-2)-6

Solution for -7(a-1)=3(4a-2)-6 equation:

-7(a-1)=3(4a-2)-6

We simplify the equation to the form, which is simple to understand 
-7(a-1)=3(4a-2)-6

Reorder the terms in parentheses
+(-7a+7)=3*(4a-2)-6

Remove unnecessary parentheses
-7a+7=+3+*(+4a-2+)-6

Reorder the terms in parentheses
-7a+7=+(+12a-6)-6

Remove unnecessary parentheses
-7a+7=+12a-6-6

We move all terms containing a to the left and all other terms to the right. 
-7a-12a=-6-6-7

We simplify left and right side of the equation. 
-19a=-19

We divide both sides of the equation by -19 to get a. 
a=1