(6a+42)=(18a-12)

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Solution for (6a+42)=(18a-12) equation: 



(6a+42)=(18a-12)

We move all terms to the left:

(6a+42)-((18a-12))=0

We get rid of parentheses

6a-((18a-12))+42=0



We calculate terms in parentheses: -((18a-12)), so:

(18a-12)

We get rid of parentheses

18a-12

Back to the equation:

-(18a-12)



We get rid of parentheses

6a-18a+12+42=0

We add all the numbers together, and all the variables

-12a+54=0

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

-12a=-54

a=-54/-12

a=4+1/2

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