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(10k-3)=4
We move all terms to the left:
(10k-3)-(4)=0
We get rid of parentheses
10k-3-4=0
We add all the numbers together, and all the variables
10k-7=0
We move all terms containing k to the left, all other terms to the right
10k=7
k=7/10
k=7/10
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