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Choose the solution of (\frac{5x-2}{7}<\frac{3x+8}{14}).

Answer and explanation

Correct answer: \(x<\frac{12}{7}\)

Multiplying both sides by the positive number \(14\) does not change the inequality sign: \(2(5x-2)<3x+8\). Thus, \(10x-4<3x+8\), so \(7x<12\) and hence \(x<\frac{12}{7}\). The option \(x\leq\frac{12}{7}\) is incorrect because at \(x=\frac{12}{7}\), both sides are equal, whereas the question has a strict \(<\) inequality. Exam tip: reverse an inequality sign only when multiplying or dividing by a negative number.

Related tags

Linear InequalitiesOne VariableRational InequalitiesAlgebraic SolutionClass 11 MathematicsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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