X+2x+3x=342

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Solution for X+2x+3x=342 equation: 



X+2X+3X=342

We move all terms to the left:

X+2X+3X-(342)=0

We add all the numbers together, and all the variables

6X-342=0

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

6X=342

X=342/6

X=57

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