18x+84=21x+18

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Solution for 18x+84=21x+18 equation: 



18x+84=21x+18

We move all terms to the left:

18x+84-(21x+18)=0

We get rid of parentheses

18x-21x-18+84=0

We add all the numbers together, and all the variables

-3x+66=0

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

-3x=-66

x=-66/-3

x=+22

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