83=5(7-a)-a

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Solution for 83=5(7-a)-a equation: 



83=5(7-a)-a

We move all terms to the left:

83-(5(7-a)-a)=0

We add all the numbers together, and all the variables

-(5(-1a+7)-a)+83=0



We calculate terms in parentheses: -(5(-1a+7)-a), so:

5(-1a+7)-a

We add all the numbers together, and all the variables

-1a+5(-1a+7)

We multiply parentheses

-1a-5a+35

We add all the numbers together, and all the variables

-6a+35

Back to the equation:

-(-6a+35)



We get rid of parentheses

6a-35+83=0

We add all the numbers together, and all the variables

6a+48=0

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

6a=-48

a=-48/6

a=-8

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