7(3+a)=77

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Solution for 7(3+a)=77 equation: 



7(3+a)=77

We move all terms to the left:

7(3+a)-(77)=0

We add all the numbers together, and all the variables

7(a+3)-77=0

We multiply parentheses

7a+21-77=0

We add all the numbers together, and all the variables

7a-56=0

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

7a=56

a=56/7

a=8

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