(X+21)=(7x-3)

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Solution for (X+21)=(7x-3) equation: 



(X+21)=(7X-3)

We move all terms to the left:

(X+21)-((7X-3))=0

We get rid of parentheses

X-((7X-3))+21=0



We calculate terms in parentheses: -((7X-3)), so:

(7X-3)

We get rid of parentheses

7X-3

Back to the equation:

-(7X-3)



We get rid of parentheses

X-7X+3+21=0

We add all the numbers together, and all the variables

-6X+24=0

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

-6X=-24

X=-24/-6

X=+4

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