X+2x+4x=15

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Solution for X+2x+4x=15 equation: 



X+2X+4X=15

We move all terms to the left:

X+2X+4X-(15)=0

We add all the numbers together, and all the variables

7X-15=0

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

7X=15

X=15/7

X=2+1/7

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