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-12=4.7k+12.5
We move all terms to the left:
-12-(4.7k+12.5)=0
We get rid of parentheses
-4.7k-12.5-12=0
We add all the numbers together, and all the variables
-4.7k-24.5=0
We move all terms containing k to the left, all other terms to the right
-4.7k=24.5
k=24.5/-4.7
k=-5+1/4.7
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