21x-3=12x+15

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Solution for 21x-3=12x+15 equation: 



21x-3=12x+15

We move all terms to the left:

21x-3-(12x+15)=0

We get rid of parentheses

21x-12x-15-3=0

We add all the numbers together, and all the variables

9x-18=0

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

9x=18

x=18/9

x=2

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