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If (\frac{4x-1}{3}-\frac{x+2}{9}\ge x+1), what is the solution for (x)?

Answer and explanation

Correct answer: \(x\ge 7\)

Multiplying both sides by the positive number \(9\) does not reverse the inequality: \(3(4x-1)-(x+2)\ge 9x+9\). Simplifying gives \(11x-5\ge 9x+9\), so \(2x\ge 14\). Hence, \(x\ge 7\). The close distractor \(x\le 7\) would result from incorrectly reversing the sign; no multiplication or division by a negative number occurs here. Exam tip: always check the sign of the number when multiplying or dividing an inequality.

Related tags

Linear InequalitiesOne VariableAlgebraic SolutionClass 11Inequality SolvingAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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