7a+7(5-2a)=84

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Solution for 7a+7(5-2a)=84 equation: 



7a+7(5-2a)=84

We move all terms to the left:

7a+7(5-2a)-(84)=0

We add all the numbers together, and all the variables

7a+7(-2a+5)-84=0

We multiply parentheses

7a-14a+35-84=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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