12x-21=7x+79

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Solution for 12x-21=7x+79 equation: 



12x-21=7x+79

We move all terms to the left:

12x-21-(7x+79)=0

We get rid of parentheses

12x-7x-79-21=0

We add all the numbers together, and all the variables

5x-100=0

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

5x=100

x=100/5

x=20

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