x+21=2x-17

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Solution for x+21=2x-17 equation: 



x+21=2x-17

We move all terms to the left:

x+21-(2x-17)=0

We get rid of parentheses

x-2x+17+21=0

We add all the numbers together, and all the variables

-1x+38=0

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

-x=-38

x=-38/-1

x=+38

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