-3a+173-3a=7(7a+9)

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Solution for -3a+173-3a=7(7a+9) equation: 



-3a+173-3a=7(7a+9)

We move all terms to the left:

-3a+173-3a-(7(7a+9))=0

We add all the numbers together, and all the variables

-6a-(7(7a+9))+173=0



We calculate terms in parentheses: -(7(7a+9)), so:

7(7a+9)

We multiply parentheses

49a+63

Back to the equation:

-(49a+63)



We get rid of parentheses

-6a-49a-63+173=0

We add all the numbers together, and all the variables

-55a+110=0

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

-55a=-110

a=-110/-55

a=+2

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