X+2x-7=20

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Solution for X+2x-7=20 equation: 



X+2X-7=20

We move all terms to the left:

X+2X-7-(20)=0

We add all the numbers together, and all the variables

3X-27=0

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

3X=27

X=27/3

X=9

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