7x+21=6x+12

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Solution for 7x+21=6x+12 equation: 



7x+21=6x+12

We move all terms to the left:

7x+21-(6x+12)=0

We get rid of parentheses

7x-6x-12+21=0

We add all the numbers together, and all the variables

x+9=0

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

x=-9

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