(X-30)+(x-31)=x

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Solution for (X-30)+(x-31)=x equation: 



(X-30)+(X-31)=X

We move all terms to the left:

(X-30)+(X-31)-(X)=0

We add all the numbers together, and all the variables

-1X+(X-30)+(X-31)=0

We get rid of parentheses

-1X+X+X-30-31=0

We add all the numbers together, and all the variables

X-61=0

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

X=61

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