(X)+(x+1)=31

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Solution for (X)+(x+1)=31 equation: 



(X)+(X+1)=31

We move all terms to the left:

(X)+(X+1)-(31)=0

We get rid of parentheses

X+X+1-31=0

We add all the numbers together, and all the variables

2X-30=0

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

2X=30

X=30/2

X=15

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