25a-28=-9(1-12a)

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Solution for 25a-28=-9(1-12a) equation: 



25a-28=-9(1-12a)

We move all terms to the left:

25a-28-(-9(1-12a))=0

We add all the numbers together, and all the variables

25a-(-9(-12a+1))-28=0



We calculate terms in parentheses: -(-9(-12a+1)), so:

-9(-12a+1)

We multiply parentheses

108a-9

Back to the equation:

-(108a-9)



We get rid of parentheses

25a-108a+9-28=0

We add all the numbers together, and all the variables

-83a-19=0

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

-83a=19

a=19/-83

a=-19/83

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