9=(2a+1)

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Solution for 9=(2a+1) equation: 



9=(2a+1)

We move all terms to the left:

9-((2a+1))=0



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

(2a+1)

We get rid of parentheses

2a+1

Back to the equation:

-(2a+1)



We get rid of parentheses

-2a-1+9=0

We add all the numbers together, and all the variables

-2a+8=0

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

-2a=-8

a=-8/-2

a=+4

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