X+2x+4=40

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Solution for X+2x+4=40 equation: 



X+2X+4=40

We move all terms to the left:

X+2X+4-(40)=0

We add all the numbers together, and all the variables

3X-36=0

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

3X=36

X=36/3

X=12

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