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 simplify the equation to the form, which is simple to understand 
25-3(7a-12)=-(9a-15)+(7-4a)

Reorder the terms in parentheses
25+(-21a+36)=-(9a-15)+(7-4a)

Remove unnecessary parentheses
+25-21a+36=-(+9a-15+)+(+7-4a+)

Remove unnecessary parentheses
25-21a+36=-9a+15+(7-4a)

Remove unnecessary parentheses
+25-21a+36=-9a+15+7-4a

We move all terms containing a to the left and all other terms to the right. 
-21a+9a+4a=+15+7-25-36

We simplify left and right side of the equation. 
-8a=-39

We divide both sides of the equation by -8 to get a. 
a=4.875

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