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What is the solution set of the inequality \(4(x+3)\ge 2x+20\)? Choose the correct option.

Answer and explanation

Correct answer: \(x\ge 4\)

Expand the bracket: \(4(x+3)=4x+12\). So \(4x+12\ge 2x+20\). Subtracting \(2x\) gives \(2x+12\ge 20\); subtract 12 to get \(2x\ge 8\). Dividing by \(2\) (positive) preserves the inequality: \(x\ge 4\). The closest distractor \(x>4\) omits the equality case \(x=4\). Exam tip: always test the boundary value (here \(x=4\)) to confirm whether equality is allowed.

Related tags

Linear InequalitiesAlgebraOne-VariableInequality SolvingBracketsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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