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What is the solution of (-3\le \frac{2x-5}{4}<1)?

Answer and explanation

Correct answer: \(-\frac{7}{2}\le x<\frac{9}{2}\)

Multiply every part of the compound inequality by the positive number 4, so the inequality signs remain unchanged: \(-12\le 2x-5<4\). Adding 5 throughout gives \(-7\le 2x<9\). Dividing by 2 gives \(-\frac{7}{2}\le x<\frac{9}{2}\). Therefore, option A is correct. Option B incorrectly reverses the inclusive and exclusive endpoint signs. Exam tip: Inequality signs reverse only when multiplying or dividing by a negative number.

Related tags

Linear InequalitiesCompound InequalitiesOne VariableAlgebraic SolutionClass 11 MathematicsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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