99=3(-2-5a)

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Solution for 99=3(-2-5a) equation: 



99=3(-2-5a)

We move all terms to the left:

99-(3(-2-5a))=0

We add all the numbers together, and all the variables

-(3(-5a-2))+99=0



We calculate terms in parentheses: -(3(-5a-2)), so:

3(-5a-2)

We multiply parentheses

-15a-6

Back to the equation:

-(-15a-6)



We get rid of parentheses

15a+6+99=0

We add all the numbers together, and all the variables

15a+105=0

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

15a=-105

a=-105/15

a=-7

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