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JAMB 1992 · UME · Q16

Find all values of xx satisfying the inequality −11≤4−3x≤28-11 \le 4 - 3x \le 28.

Worked solution (try it first)
  1. Subtract 4 from all three parts: −15≤−3x≤24-15 \le -3x \le 24.
  2. Divide all three parts by −3-3 and reverse both signs: 5≥x≥−85 \ge x \ge -8.
  3. Read from the left: −8≤x≤5-8 \le x \le 5, option C.

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