(a-3)=-18

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Solution for (a-3)=-18 equation: 



(a-3)=-18

We move all terms to the left:

(a-3)-(-18)=0

We add all the numbers together, and all the variables

(a-3)+18=0

We get rid of parentheses

a-3+18=0

We add all the numbers together, and all the variables

a+15=0

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

a=-15

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