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What is the solution of the inequality 4(x + 1) ≥ 2(x + 5)?

Answer and explanation

Correct answer: x ≥ 3

The governing concept is algebraic equivalence for inequalities: expand brackets, collect like terms, and divide by a positive coefficient without reversing the sign. Expanding gives 4x + 4 ≥ 2x + 10. Subtract 2x from both sides to obtain 2x + 4 ≥ 10, and subtract 4 to get 2x ≥ 6. Dividing by positive 2 yields x ≥ 3, so option A is correct. The equality is retained because x = 3 makes both sides equal to 16. Option C incorrectly excludes this valid boundary, while B and D reverse the direction. The complete solution is every real number at least 3.

Related tags

Linear InequalitiesBracket ExpansionVariables Both SidesAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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