X+3x+8=120

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Solution for X+3x+8=120 equation: 



X+3X+8=120

We move all terms to the left:

X+3X+8-(120)=0

We add all the numbers together, and all the variables

4X-112=0

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

4X=112

X=112/4

X=28

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