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If \(x\in\mathbb{R}\) and \(3-2x\) is positive, which is the correct solution for \(x\)?

Answer and explanation

Correct answer: \(x<\frac{3}{2}\)

A positive expression satisfies \(3-2x>0\). Thus, \(-2x>-3\). Dividing both sides by the negative number \(-2\) reverses the inequality sign, giving \(x<\frac{3}{2}\). Option B results from forgetting this reversal. Exam tip: Always reverse an inequality sign when multiplying or dividing by a negative number.

Related tags

Linear InequalitiesInequality SignsReal NumbersPositive ExpressionsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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