21x-9=3

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Solution for 21x-9=3 equation: 



21x-9=3

We move all terms to the left:

21x-9-(3)=0

We add all the numbers together, and all the variables

21x-12=0

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

21x=12

x=12/21

x=4/7

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