5x-21=5x-20

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Solution for 5x-21=5x-20 equation: 



5x-21=5x-20

We move all terms to the left:

5x-21-(5x-20)=0

We get rid of parentheses

5x-5x+20-21=0

We add all the numbers together, and all the variables

-1!=0

There is no solution for this equation

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