9(a-7)=81

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Solution for 9(a-7)=81 equation: 



9(a-7)=81

We move all terms to the left:

9(a-7)-(81)=0

We multiply parentheses

9a-63-81=0

We add all the numbers together, and all the variables

9a-144=0

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

9a=144

a=144/9

a=16

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