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What is the solution of the inequality \(\frac{2x}{3}-\frac{x}{4}\leq 5\)?

Answer and explanation

Correct answer: \(x\leq 12\)

Using the common denominator 12, we get \(\frac{8x-3x}{12}\leq 5\), so \(\frac{5x}{12}\leq 5\). Multiplying both sides by the positive number \(\frac{12}{5}\) does not reverse the inequality, giving \(x\leq 12\). Hence, option B is correct. Option C is incorrect because it excludes \(x=12\), even though equality is included in the original inequality. Exam tip: multiplying or dividing an inequality by a positive number leaves its direction unchanged.

Related tags

Fractional InequalitiesLinear InequalitiesAlgebraic SolutionAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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