X+20=2x-12=3x-18

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Solution for X+20=2x-12=3x-18 equation: 



X+20=2X-12=3X-18

We move all terms to the left:

X+20-(2X-12)=0

We get rid of parentheses

X-2X+12+20=0

We add all the numbers together, and all the variables

-1X+32=0

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

-X=-32

X=-32/-1

X=+32

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