12-5a=3(-6-5a)

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Solution for 12-5a=3(-6-5a) equation: 



12-5a=3(-6-5a)

We move all terms to the left:

12-5a-(3(-6-5a))=0

We add all the numbers together, and all the variables

-5a-(3(-5a-6))+12=0



We calculate terms in parentheses: -(3(-5a-6)), so:

3(-5a-6)

We multiply parentheses

-15a-18

Back to the equation:

-(-15a-18)



We get rid of parentheses

-5a+15a+18+12=0

We add all the numbers together, and all the variables

10a+30=0

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

10a=-30

a=-30/10

a=-3

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