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Choose the solution set of (\frac{x-2}{5}\le \frac{x+4}{3}).

Answer and explanation

Correct answer: (x\ge -13)

The correct answer is option A: x ≥ −13. Because 5 and 3 are positive, multiply the inequality by 15 without changing its direction: 3(x − 2) ≤ 5(x + 4). Expand: 3x − 6 ≤ 5x + 20. Subtract 3x: −6 ≤ 2x. Subtract 20: −26 ≤ 2x. Divide by positive 2: −13 ≤ x, which is the same as x ≥ −13. Option A matches this closed solution because equality is included. Option B, x ≤ −13, reverses the direction and fails for x = 0. Option C, x ≤ 13, has the wrong sign and wrong boundary. Option D, x > −13, wrongly excludes x = −13, even though equality satisfies the original inequality. Check: at x = −13 both sides are −3, so equality is valid. Memory cue: multiplying by a positive number keeps the inequality sign; dividing by a negative number reverses it.

Related tags

Linear InequalitiesFractionsLcm

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