215=5(6a+7)

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Solution for 215=5(6a+7) equation: 



215=5(6a+7)

We move all terms to the left:

215-(5(6a+7))=0



We calculate terms in parentheses: -(5(6a+7)), so:

5(6a+7)

We multiply parentheses

30a+35

Back to the equation:

-(30a+35)



We get rid of parentheses

-30a-35+215=0

We add all the numbers together, and all the variables

-30a+180=0

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

-30a=-180

a=-180/-30

a=+6

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