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If (9-4(x+1)<2(3-x)), what is the correct condition for (x)?

Answer and explanation

Correct answer: \(x>-\frac{1}{2}\)

On expanding the brackets, \(9-4x-4<6-2x\), so \(5-4x<6-2x\). Adding \(4x\) to both sides gives \(5<6+2x\), hence \(-1<2x\). Dividing by 2 gives \(x>-\frac{1}{2}\). The option \(x\geq-\frac{1}{2}\) is incorrect because the original inequality is strict, so \(x=-\frac{1}{2}\) is not included. Exam tip: dividing by a positive number does not reverse the inequality sign.

Related tags

Linear InequalitiesOne Variable InequalitiesAlgebraic SimplificationBracketsClass 11 MathematicsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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