21-xXx=24

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Solution for 21-xXx=24 equation: 



21-xxx=24

We move all terms to the left:

21-xxx-(24)=0

We add all the numbers together, and all the variables

-xxx-3=0

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

-xxx=3

x=3/1

x=3

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