X+3x+42=102

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Solution for X+3x+42=102 equation: 



X+3X+42=102

We move all terms to the left:

X+3X+42-(102)=0

We add all the numbers together, and all the variables

4X-60=0

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

4X=60

X=60/4

X=15

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