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What is the solution of the inequality 5x + 2 ≥ 17?

Answer and explanation

Correct answer: x ≥ 3

The governing concept is that subtracting the same quantity from both sides preserves an inequality, and division by a positive number preserves its direction. Starting with 5x + 2 ≥ 17, subtract 2 from both sides to get 5x ≥ 15. Divide by 5, which is positive, and obtain x ≥ 3. The equality sign remains because x = 3 gives 5(3) + 2 = 17, so the original statement is true at the boundary. Therefore option A is correct. Option C incorrectly changes the inclusive relation to a strict one and excludes x = 3. Options B and D reverse the direction, placing the solution on the wrong side of the boundary. In interval notation, the solution is [3, ∞).

Related tags

Linear-InequalitiesTwo-Step-SolutionPositive-DivisionEndpoint-InclusionAlgebraic Solution Of Linear Inequalities In One VariableLinear InequalitiesMathematicsClass 11 Mcq

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