-3u ≤ - 12

Answer 1

To solve this inequality, we will isolate the variable u.

To do this, we can start by adding 3u to both sides of the inequality:
-3u + 3u ≤ -12 + 3u

Simplifying the left side:
0 ≤ -12 + 3u

Next, we can add 12 to both sides of the inequality:
0 + 12 ≤ -12 + 12 + 3u

Simplifying the right side:
12 ≤ 3u

Finally, we can divide both sides of the inequality by 3:
12/3 ≤ 3u/3

Simplifying:
4 ≤ u

Therefore, the solution to the inequality is u ≥ 4.