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What is the solution of the inequality 3x + 5 > 14?

Answer and explanation

Correct answer: x > 3

The governing concept is maintaining an inequality while carrying out equivalent operations on both sides. Start with 3x + 5 > 14. Subtract 5 from both sides to obtain 3x > 9. Then divide by the positive number 3; the direction remains unchanged, giving x > 3. Therefore option A is correct. Since the original symbol is strictly greater than, x = 3 is not included: substituting it gives 3(3) + 5 = 14, and 14 > 14 is false. Option B reverses the direction without justification. Option C incorrectly includes the endpoint, and option D both reverses the direction and includes the endpoint. Any value such as x = 4 satisfies the original inequality.

Related tags

Linear InequalitiesAlgebraic SolutionOne VariableStrict InequalityMathematicsClass 11 McqAlgebraic Solution Of Linear Inequalities In One Variable

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