X-28+x=140

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Solution for X-28+x=140 equation: 



X-28+X=140

We move all terms to the left:

X-28+X-(140)=0

We add all the numbers together, and all the variables

2X-168=0

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

2X=168

X=168/2

X=84

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