3(a-6)=99

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Solution for 3(a-6)=99 equation: 



3(a-6)=99

We move all terms to the left:

3(a-6)-(99)=0

We multiply parentheses

3a-18-99=0

We add all the numbers together, and all the variables

3a-117=0

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

3a=117

a=117/3

a=39

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