Solve for k
k\geq -4
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-4k\leq 21-5
Subtract 5 from both sides.
-4k\leq 16
Subtract 5 from 21 to get 16.
k\geq \frac{16}{-4}
Divide both sides by -4. Since -4 is negative, the inequality direction is changed.
k\geq -4
Divide 16 by -4 to get -4.
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