X+2x+20=40-x

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Solution for X+2x+20=40-x equation: 



X+2X+20=40-X

We move all terms to the left:

X+2X+20-(40-X)=0

We add all the numbers together, and all the variables

X+2X-(-1X+40)+20=0

We add all the numbers together, and all the variables

3X-(-1X+40)+20=0

We get rid of parentheses

3X+1X-40+20=0

We add all the numbers together, and all the variables

4X-20=0

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

4X=20

X=20/4

X=5

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