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If x is a real number, what is the solution set of the inequality \(-4x-1<7\)?

Answer and explanation

Correct answer: \(x>-2\)

Adding 1 to both sides of \(-4x-1<7\) gives \(-4x<8\). Dividing both sides by \(-4\) reverses the inequality sign, so \(x>-2\). Option B results from forgetting this reversal. Exam tip: always reverse an inequality sign when multiplying or dividing by a negative number.

Related tags

Linear InequalitiesNegative CoefficientReal NumbersInequality Sign ReversalAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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