Solve for k
k<1
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20-20k>0
Add 16 and 4 to get 20.
-20k>-20
Subtract 20 from both sides. Anything subtracted from zero gives its negation.
k<\frac{-20}{-20}
Divide both sides by -20. Since -20 is negative, the inequality direction is changed.
k<1
Divide -20 by -20 to get 1.
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