3k+12k=45

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Solution for 3k+12k=45 equation: 



3k+12k=45

We move all terms to the left:

3k+12k-(45)=0

We add all the numbers together, and all the variables

15k-45=0

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

15k=45

k=45/15

k=3

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