120-2x=20

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Solution for 120-2x=20 equation: 



120-2x=20

We move all terms to the left:

120-2x-(20)=0

We add all the numbers together, and all the variables

-2x+100=0

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

-2x=-100

x=-100/-2

x=+50

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