5x-18=21+2x

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Solution for 5x-18=21+2x equation: 



5x-18=21+2x

We move all terms to the left:

5x-18-(21+2x)=0

We add all the numbers together, and all the variables

5x-(2x+21)-18=0

We get rid of parentheses

5x-2x-21-18=0

We add all the numbers together, and all the variables

3x-39=0

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

3x=39

x=39/3

x=13

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