x-21=3x+17

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Solution for x-21=3x+17 equation: 



x-21=3x+17

We move all terms to the left:

x-21-(3x+17)=0

We get rid of parentheses

x-3x-17-21=0

We add all the numbers together, and all the variables

-2x-38=0

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

-2x=38

x=38/-2

x=-19

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