X+15+2x=144

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Solution for X+15+2x=144 equation: 



X+15+2X=144

We move all terms to the left:

X+15+2X-(144)=0

We add all the numbers together, and all the variables

3X-129=0

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

3X=129

X=129/3

X=43

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