x-21=5(2x+3)-9

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Solution for x-21=5(2x+3)-9 equation: 



x-21=5(2x+3)-9

We move all terms to the left:

x-21-(5(2x+3)-9)=0



We calculate terms in parentheses: -(5(2x+3)-9), so:

5(2x+3)-9

We multiply parentheses

10x+15-9

We add all the numbers together, and all the variables

10x+6

Back to the equation:

-(10x+6)



We get rid of parentheses

x-10x-6-21=0

We add all the numbers together, and all the variables

-9x-27=0

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

-9x=27

x=27/-9

x=-3

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