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18=5k-4
We move all terms to the left:
18-(5k-4)=0
We get rid of parentheses
-5k+4+18=0
We add all the numbers together, and all the variables
-5k+22=0
We move all terms containing k to the left, all other terms to the right
-5k=-22
k=-22/-5
k=4+2/5
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