30+-6a=-3(5+7a)

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Solution for 30+-6a=-3(5+7a) equation: 



30+-6a=-3(5+7a)

We move all terms to the left:

30+-6a-(-3(5+7a))=0

We add all the numbers together, and all the variables

-6a-(-3(7a+5))+30+=0

We add all the numbers together, and all the variables

-6a-(-3(7a+5))=0



We calculate terms in parentheses: -(-3(7a+5)), so:

-3(7a+5)

We multiply parentheses

-21a-15

Back to the equation:

-(-21a-15)



We get rid of parentheses

-6a+21a+15=0

We add all the numbers together, and all the variables

15a+15=0

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

15a=-15

a=-15/15

a=-1

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