3-(a-3)=-18

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



3-(a-3)=-18

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(a-3)+21=0

We get rid of parentheses

-a+3+21=0

We add all the numbers together, and all the variables

-1a+24=0

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

-a=-24

a=-24/-1

a=+24

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