-2x+20=50

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Solution for -2x+20=50 equation: 



-2x+20=50

We move all terms to the left:

-2x+20-(50)=0

We add all the numbers together, and all the variables

-2x-30=0

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

-2x=30

x=30/-2

x=-15

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