4x=18-(-5x+21)

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Solution for 4x=18-(-5x+21) equation: 



4x=18-(-5x+21)

We move all terms to the left:

4x-(18-(-5x+21))=0



We calculate terms in parentheses: -(18-(-5x+21)), so:

18-(-5x+21)

determiningTheFunctionDomain
-(-5x+21)+18

We get rid of parentheses

5x-21+18

We add all the numbers together, and all the variables

5x-3

Back to the equation:

-(5x-3)



We get rid of parentheses

4x-5x+3=0

We add all the numbers together, and all the variables

-1x+3=0

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

-x=-3

x=-3/-1

x=+3

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