-18+3x=-30

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Solution for -18+3x=-30 equation: 



-18+3x=-30

We move all terms to the left:

-18+3x-(-30)=0

We add all the numbers together, and all the variables

3x+12=0

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

3x=-12

x=-12/3

x=-4

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