100x-80=80x+60

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Solution for 100x-80=80x+60 equation: 



100x-80=80x+60

We move all terms to the left:

100x-80-(80x+60)=0

We get rid of parentheses

100x-80x-60-80=0

We add all the numbers together, and all the variables

20x-140=0

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

20x=140

x=140/20

x=7

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