Question

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

Answer 1

`k>=-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,

`5-4k<=21`

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

`:. k>=-4`
Hence the answer.

Hope it helps :)