Algebra practice question

Answer: 1

Multiply by 3: −3 ≤ 2x + 1 < 9, so −2 ≤ x < 4. The least integer is −2 and the greatest is 3; their sum is 1.

Common wrong answers

If you answered 0

0 pairs −2 with 2.

If you answered 2

2 wrongly includes x = 4, but the right inequality is strict.

If you answered -1

−1 uses least −3 and greatest 2, forgetting to subtract 1 before halving.

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