21x+4=21x-5

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Solution for 21x+4=21x-5 equation: 



21x+4=21x-5

We move all terms to the left:

21x+4-(21x-5)=0

We get rid of parentheses

21x-21x+5+4=0

We add all the numbers together, and all the variables

9!=0

There is no solution for this equation

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