Algebra practice question

Answer: A. x ≥ 12

Multiply both sides by 4: x ≥ 12.

Why the other answers are wrong

B. x ≤ 12

Multiplying by the positive number 4 keeps the direction: x ≥ 12.

C. x ≥ 3/4

3/4 inverts the operation; multiply by 4 instead.

D. x ≥ 7

7 adds 4 and 3; the inequality multiplies: 4 · 3 = 12.

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