a+4(3a=7)=80

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Solution for a+4(3a=7)=80 equation: 



a+4(3a=7)=80

We move all terms to the left:

a+4(3a-(7))=0

We multiply parentheses

a+12a-28=0

We add all the numbers together, and all the variables

13a-28=0

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

13a=28

a=28/13

a=2+2/13

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