# How do you solve the inequality 5 - 4k ≤ 21?

May 29, 2018

$k \ge - 4$

#### Explanation:

You just have to keep in mind that multiplying or dividing both side by a negative number, in inequality, swaps the inequality sign!
Now proceed the problem with usual approach.
We have,

$5 - 4 k \le 21$

Subtracting both side by 5 and dividing both side by -4,

$\therefore k \ge - 4$