6(a-1)=-18

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Solution for 6(a-1)=-18 equation: 



6(a-1)=-18

We move all terms to the left:

6(a-1)-(-18)=0

We add all the numbers together, and all the variables

6(a-1)+18=0

We multiply parentheses

6a-6+18=0

We add all the numbers together, and all the variables

6a+12=0

We move all terms containing a to the left, all other terms to the right

6a=-12

a=-12/6

a=-2

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