4k+k+k-3k=12

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Solution for 4k+k+k-3k=12 equation: 



4k+k+k-3k=12

We move all terms to the left:

4k+k+k-3k-(12)=0

We add all the numbers together, and all the variables

3k-12=0

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

3k=12

k=12/3

k=4

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