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What is the solution set of (\frac{1}{3}(6x-9)-\frac{1}{2}(4x+2)\ge -5)?

Answer and explanation

Correct answer: \(x\in\mathbb{R}\)

Simplifying the left-hand side gives \(\frac{1}{3}(6x-9)=2x-3\) and \(\frac{1}{2}(4x+2)=2x+1\). Hence, the left-hand side is \((2x-3)-(2x+1)=-4\). Since \(-4\geq -5\) is always true, the inequality holds for every real value of \(x\). The option \(x\geq -5\) restricts \(x\), but this inequality imposes no restriction. Exam tip: When variable terms cancel, check whether the resulting constant statement is true or false.

Related tags

Linear InequalitiesOne VariableSolution SetReal NumbersAlgebraic SimplificationClass 11Algebraic Solution Of Linear Inequalities In One VariableMathematics

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