18x=21x+7

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Solution for 18x=21x+7 equation: 



18x=21x+7

We move all terms to the left:

18x-(21x+7)=0

We get rid of parentheses

18x-21x-7=0

We add all the numbers together, and all the variables

-3x-7=0

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

-3x=7

x=7/-3

x=-2+1/3

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