-18=3a-6

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Solution for -18=3a-6 equation: 



-18=3a-6

We move all terms to the left:

-18-(3a-6)=0

We get rid of parentheses

-3a+6-18=0

We add all the numbers together, and all the variables

-3a-12=0

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

-3a=12

a=12/-3

a=-4

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