X-7+x-2=81

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Solution for X-7+x-2=81 equation: 



X-7+X-2=81

We move all terms to the left:

X-7+X-2-(81)=0

We add all the numbers together, and all the variables

2X-90=0

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

2X=90

X=90/2

X=45

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