21x-3=15

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Solution for 21x-3=15 equation: 



21x-3=15

We move all terms to the left:

21x-3-(15)=0

We add all the numbers together, and all the variables

21x-18=0

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

21x=18

x=18/21

x=6/7

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