25-3(7a-12)=-(9a-15)+(7-4a

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Solution for 25-3(7a-12)=-(9a-15)+(7-4a equation: 



25-3(7a-12)=-(9a-15)+(7-4a

We move all terms to the left:

25-3(7a-12)-(-(9a-15)+(7-4a)=0

We add all the numbers together, and all the variables

-3(7a-12)-(-(9a-15)+(-4a+7)+25=0

We multiply parentheses

-21a-(-(9a-15)+(-4a+7)+25+36=0

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