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If x∈R and 5−2x<1, which solution is correct?

Answer and explanation

Correct answer: x>2

The governing rule is that solving a linear inequality follows the usual equation steps, except that multiplying or dividing by a negative number reverses the inequality sign. Start with 5−2x<1. Subtract 5 from both sides to obtain −2x<−4. Now divide both sides by −2; because the divisor is negative, the sign changes from < to >, giving x>2. A quick check supports this result: x=3 gives 5−6=−1, and −1<1 is true, whereas x=1 gives 3<1, which is false. Option B forgets the reversal, while C and D use the wrong boundary or direction. Thus A is correct.

Related tags

Real-SolutionSign-ChangeLinear-InequalityAlgebraic Solution Of Linear Inequalities In One VariableLinear InequalitiesMathematicsClass 11 Mcq

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