5x+21=12x+

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Solution for 5x+21=12x+ equation: 



5x+21=12x+

We move all terms to the left:

5x+21-(12x+)=0

We add all the numbers together, and all the variables

5x-(+12x)+21=0

We get rid of parentheses

5x-12x+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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