X+1x+2x=20

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Solution for X+1x+2x=20 equation: 



X+1X+2X=20

We move all terms to the left:

X+1X+2X-(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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