21=(2x+3)

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Solution for 21=(2x+3) equation: 



21=(2x+3)

We move all terms to the left:

21-((2x+3))=0



We calculate terms in parentheses: -((2x+3)), so:

(2x+3)

We get rid of parentheses

2x+3

Back to the equation:

-(2x+3)



We get rid of parentheses

-2x-3+21=0

We add all the numbers together, and all the variables

-2x+18=0

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

-2x=-18

x=-18/-2

x=+9

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