6k-9=3k-12

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



6k-9=3k-12

We move all terms to the left:

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

We get rid of parentheses

6k-3k+12-9=0

We add all the numbers together, and all the variables

3k+3=0

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

3k=-3

k=-3/3

k=-1

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