X+3+2x=18

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Solution for X+3+2x=18 equation: 



X+3+2X=18

We move all terms to the left:

X+3+2X-(18)=0

We add all the numbers together, and all the variables

3X-15=0

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

3X=15

X=15/3

X=5

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