X+(7+x)+(2+x)=45

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Solution for X+(7+x)+(2+x)=45 equation: 



X+(7+X)+(2+X)=45

We move all terms to the left:

X+(7+X)+(2+X)-(45)=0

We add all the numbers together, and all the variables

X+(X+7)+(X+2)-45=0

We get rid of parentheses

X+X+X+7+2-45=0

We add all the numbers together, and all the variables

3X-36=0

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

3X=36

X=36/3

X=12

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