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18=4k+8
We move all terms to the left:
18-(4k+8)=0
We get rid of parentheses
-4k-8+18=0
We add all the numbers together, and all the variables
-4k+10=0
We move all terms containing k to the left, all other terms to the right
-4k=-10
k=-10/-4
k=2+1/2
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