(21x-9)=(3x-27)

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Solution for (21x-9)=(3x-27) equation: 



(21x-9)=(3x-27)

We move all terms to the left:

(21x-9)-((3x-27))=0

We get rid of parentheses

21x-((3x-27))-9=0



We calculate terms in parentheses: -((3x-27)), so:

(3x-27)

We get rid of parentheses

3x-27

Back to the equation:

-(3x-27)



We get rid of parentheses

21x-3x+27-9=0

We add all the numbers together, and all the variables

18x+18=0

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

18x=-18

x=-18/18

x=-1

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