x+20=2x-19

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Solution for x+20=2x-19 equation: 



x+20=2x-19

We move all terms to the left:

x+20-(2x-19)=0

We get rid of parentheses

x-2x+19+20=0

We add all the numbers together, and all the variables

-1x+39=0

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

-x=-39

x=-39/-1

x=+39

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