(9x-21)=(10x-10)

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Solution for (9x-21)=(10x-10) equation: 



(9x-21)=(10x-10)

We move all terms to the left:

(9x-21)-((10x-10))=0

We get rid of parentheses

9x-((10x-10))-21=0



We calculate terms in parentheses: -((10x-10)), so:

(10x-10)

We get rid of parentheses

10x-10

Back to the equation:

-(10x-10)



We get rid of parentheses

9x-10x+10-21=0

We add all the numbers together, and all the variables

-1x-11=0

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

-x=11

x=11/-1

x=-11

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