-3+6-3x=-18

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Solution for -3+6-3x=-18 equation: 



-3+6-3x=-18

We move all terms to the left:

-3+6-3x-(-18)=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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