12x=21+5x

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Solution for 12x=21+5x equation: 



12x=21+5x

We move all terms to the left:

12x-(21+5x)=0

We add all the numbers together, and all the variables

12x-(5x+21)=0

We get rid of parentheses

12x-5x-21=0

We add all the numbers together, and all the variables

7x-21=0

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

7x=21

x=21/7

x=3

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