5x-21=2x.

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Solution for 5x-21=2x. equation: 



5x-21=2x.

We move all terms to the left:

5x-21-(2x.)=0

We add all the numbers together, and all the variables

5x-(+2x.)-21=0

We get rid of parentheses

5x-2x.-21=0

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

5x-2x.=21

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