X+3x+8=2x-12

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Solution for X+3x+8=2x-12 equation: 



X+3X+8=2X-12

We move all terms to the left:

X+3X+8-(2X-12)=0

We add all the numbers together, and all the variables

4X-(2X-12)+8=0

We get rid of parentheses

4X-2X+12+8=0

We add all the numbers together, and all the variables

2X+20=0

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

2X=-20

X=-20/2

X=-10

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