21x-x=13

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Solution for 21x-x=13 equation: 



21x-x=13

We move all terms to the left:

21x-x-(13)=0

We add all the numbers together, and all the variables

20x-13=0

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

20x=13

x=13/20

x=13/20

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