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What is the solution of (12-5x\ge 3(4-2x)+x)?

Answer and explanation

Correct answer: All real numbers

Simplifying the right-hand side gives \(3(4-2x)+x=12-6x+x=12-5x\). Thus, the inequality becomes \(12-5x\ge 12-5x\), which is true for every real value of \(x\). The conditions \(x\le0\) and \(x\ge0\) include only some values, whereas this inequality has no restriction. Exam tip: Simplify both sides first; if they become identical with \(\ge\) or \(\le\), the solution is all real numbers.

Related tags

Linear InequalitiesOne VariableIdentity InequalityAll Real NumbersClass 11 AlgebraAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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