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Find the solution of the inequality \(4(x+1)-\frac{2x-3}{3}<\frac{5x+6}{2}\).

Answer and explanation

Correct answer: \(x<-\frac{12}{5}\)

Multiply both sides by the positive number 6 to clear the denominators, so the inequality sign remains unchanged: \(24x+24-2(2x-3)<3(5x+6)\). This simplifies to \(20x+30<15x+18\), giving \(5x<-12\), and hence \(x<-\frac{12}{5}\). Since the original inequality is strict, \(x=-\frac{12}{5}\) is not included. Exam tip: reverse the inequality sign only when multiplying or dividing by a negative number.

Related tags

Linear InequalitiesInequality SolvingAlgebraic ManipulationClass 11Strict InequalitiesAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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