4x-21=3x+18

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Solution for 4x-21=3x+18 equation: 



4x-21=3x+18

We move all terms to the left:

4x-21-(3x+18)=0

We get rid of parentheses

4x-3x-18-21=0

We add all the numbers together, and all the variables

x-39=0

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

x=39

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