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Solve the inequality \(4(x-2)+3\le2x+9\).

Answer and explanation

Correct answer: \(x\le7\)

The governing concept is solving a linear inequality in one variable while preserving the inequality direction. First expand the left side: 4(x − 2) + 3 = 4x − 8 + 3 = 4x − 5. The inequality therefore becomes 4x − 5 ≤ 2x + 9. Subtract 2x from both sides to get 2x − 5 ≤ 9, then add 5 to obtain 2x ≤ 14. Dividing by the positive number 2 gives x ≤ 7; the sign remains unchanged because division by a positive number does not reverse an inequality. Thus option A is correct. Option B reverses the direction without justification, option C incorrectly removes equality, and option D comes from an arithmetic error.

Related tags

Linear InequalitiesOne VariableAlgebraic SolutionInequality RulesAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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