7(a+4)+12=89

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Solution for 7(a+4)+12=89 equation: 



7(a+4)+12=89

We move all terms to the left:

7(a+4)+12-(89)=0

We add all the numbers together, and all the variables

7(a+4)-77=0

We multiply parentheses

7a+28-77=0

We add all the numbers together, and all the variables

7a-49=0

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

7a=49

a=49/7

a=7

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