18x+30=21x-6

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Solution for 18x+30=21x-6 equation: 



18x+30=21x-6

We move all terms to the left:

18x+30-(21x-6)=0

We get rid of parentheses

18x-21x+6+30=0

We add all the numbers together, and all the variables

-3x+36=0

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

-3x=-36

x=-36/-3

x=+12

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