-x-3x-12=-6x+18

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Solution for -x-3x-12=-6x+18 equation: 



-x-3x-12=-6x+18

We move all terms to the left:

-x-3x-12-(-6x+18)=0

We add all the numbers together, and all the variables

-4x-(-6x+18)-12=0

We get rid of parentheses

-4x+6x-18-12=0

We add all the numbers together, and all the variables

2x-30=0

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

2x=30

x=30/2

x=15

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