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

Answer and explanation

Correct answer: \(x>-\frac{8}{9}\)

Multiplying both sides by 18 does not change the inequality sign because 18 is positive: \(2(2-3x)<3(x+4)\). Thus, \(4-6x<3x+12\), so \(-9x<8\). On dividing by \(-9\), the inequality sign reverses, giving \(x>-\frac{8}{9}\). \(x\geq-\frac{8}{9}\) is incorrect because the original inequality is strict. Exam tip: always reverse the inequality sign when multiplying or dividing by a negative number.

Related tags

Linear InequalitiesOne Variable InequalitiesAlgebraic SolutionClass 11 MathematicsInequality Sign ReversalAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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