18k-12=78

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Solution for 18k-12=78 equation: 



18k-12=78

We move all terms to the left:

18k-12-(78)=0

We add all the numbers together, and all the variables

18k-90=0

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

18k=90

k=90/18

k=5

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