X+y+3=31

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Solution for X+y+3=31 equation: 



X+X+3=31

We move all terms to the left:

X+X+3-(31)=0

We add all the numbers together, and all the variables

2X-28=0

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

2X=28

X=28/2

X=14

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