x-39+x=129

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Solution for x-39+x=129 equation: 



x-39+x=129

We move all terms to the left:

x-39+x-(129)=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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