X+2x+4x=210

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Solution for X+2x+4x=210 equation: 



X+2X+4X=210

We move all terms to the left:

X+2X+4X-(210)=0

We add all the numbers together, and all the variables

7X-210=0

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

7X=210

X=210/7

X=30

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