a+(3a+7)=80

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Solution for a+(3a+7)=80 equation: 



a+(3a+7)=80

We move all terms to the left:

a+(3a+7)-(80)=0

We get rid of parentheses

a+3a+7-80=0

We add all the numbers together, and all the variables

4a-73=0

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

4a=73

a=73/4

a=18+1/4

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