Oh, dude, 2k plus k is like adding two of your favorite snacks plus one more - it's just 3k. So, if k represents a candy bar, then 2k plus k equals 3 candy bars. Easy peasy, right?
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k=4
3k-1=k+2 2k=3 k=3/2=1.5
36.64
9 - 2k - 3 = k Add 2k to both sides: 9 - 3 = k + 2k Combine like terms: 6 = 3k Divide both sides by 3: 2 = k
2k - 1 = 0 Add 1 to both sides: 2k = 1 Divide both sides by two: k = 0.5