90=-6(2a+1)

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Solution for 90=-6(2a+1) equation: 



90=-6(2a+1)

We move all terms to the left:

90-(-6(2a+1))=0



We calculate terms in parentheses: -(-6(2a+1)), so:

-6(2a+1)

We multiply parentheses

-12a-6

Back to the equation:

-(-12a-6)



We get rid of parentheses

12a+6+90=0

We add all the numbers together, and all the variables

12a+96=0

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

12a=-96

a=-96/12

a=-8

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