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Solve the inequality (-2(3-x)+4>x+10).

Answer and explanation

Correct answer: \(x>12\)

On expanding the bracket, \(-2(3-x)=-6+2x\), since \(-2\times(-x)=+2x\). Thus, \(-6+2x+4>x+10\), or \(2x-2>x+10\). Rearranging gives \(x>12\). Therefore, \(x>12\) is the correct option. \(x\ge12\) is incorrect because at \(x=12\) both sides are equal, whereas the inequality is strict. Exam tip: when removing brackets, multiply every term inside by the negative coefficient carefully.

Related tags

Linear InequalitiesOne Variable InequalityAlgebraic SolutionBracket ExpansionInequality SymbolsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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