3k+6=12+9k

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Solution for 3k+6=12+9k equation: 



3k+6=12+9k

We move all terms to the left:

3k+6-(12+9k)=0

We add all the numbers together, and all the variables

3k-(9k+12)+6=0

We get rid of parentheses

3k-9k-12+6=0

We add all the numbers together, and all the variables

-6k-6=0

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

-6k=6

k=6/-6

k=-1

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