172=4(1+7a)

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Solution for 172=4(1+7a) equation: 



172=4(1+7a)

We move all terms to the left:

172-(4(1+7a))=0

We add all the numbers together, and all the variables

-(4(7a+1))+172=0



We calculate terms in parentheses: -(4(7a+1)), so:

4(7a+1)

We multiply parentheses

28a+4

Back to the equation:

-(28a+4)



We get rid of parentheses

-28a-4+172=0

We add all the numbers together, and all the variables

-28a+168=0

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

-28a=-168

a=-168/-28

a=+6

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