-12-2k=-3k-k

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Solution for -12-2k=-3k-k equation: 



-12-2k=-3k-k

We move all terms to the left:

-12-2k-(-3k-k)=0

We add all the numbers together, and all the variables

-2k-(-4k)-12=0

We get rid of parentheses

-2k+4k-12=0

We add all the numbers together, and all the variables

2k-12=0

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

2k=12

k=12/2

k=6

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