x-0.2x=129

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Solution for x-0.2x=129 equation: 



x-0.2x=129

We move all terms to the left:

x-0.2x-(129)=0

We add all the numbers together, and all the variables

0.8x-129=0

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

0.8x=129

x=129/0.8

x=161+0.2/0.8

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