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Solve the inequality (5(1-2x)\le 3-4(2x+1)).

Answer and explanation

Correct answer: \(x \ge 3\)

Expanding gives \(5-10x\) on the left and \(3-8x-4=-1-8x\) on the right. Thus, \(5-10x\le -1-8x\), so \(6\le 2x\). Dividing by 2 does not reverse the inequality, giving \(x\ge 3\). The closest distractor is \(x>3\), but \(x=3\) also satisfies the inequality. Exam tip: reverse an inequality sign only when multiplying or dividing by a negative number.

Related tags

Linear InequalitiesOne VariableAlgebraic SolutionClass 11Inequality SolvingAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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