-3x-12=-9x-30

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Solution for -3x-12=-9x-30 equation: 



-3x-12=-9x-30

We move all terms to the left:

-3x-12-(-9x-30)=0

We get rid of parentheses

-3x+9x+30-12=0

We add all the numbers together, and all the variables

6x+18=0

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

6x=-18

x=-18/6

x=-3

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