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Which of the following is the correct solution of the inequality \(\frac{2x+1}{3}\leq\frac{x+9}{6}\)?

Answer and explanation

Correct answer: \(x\leq\frac{7}{3}\)

Multiplying both sides by 6, which is positive, gives \(2(2x+1)\leq x+9\). Thus, \(4x+2\leq x+9\), so \(3x\leq7\) and \(x\leq\frac{7}{3}\). Option B incorrectly reverses the inequality, while C and D replace the non-strict inequality with an unnecessarily strict one. Exam tip: multiplying or dividing an inequality by a positive number does not change its sign.

Related tags

Linear InequalitiesFractional InequalityOne VariableAlgebraic SolutionAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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