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Which is the solution of (x+4)/2 − (x−3)/5 < 4?

Answer and explanation

Correct answer: x < 14/3

The governing concept is the algebraic solution of a linear inequality in one variable. The denominators 2 and 5 are positive, so multiply the entire inequality by their least common multiple, 10; the inequality sign does not change. This gives 5(x+4) − 2(x−3) < 40, or 5x+20−2x+6 < 40. Hence 3x+26 < 40, so 3x < 14 and therefore x < 14/3. Thus option A is correct. Option B reverses the direction without justification, option C introduces an incorrect negative value, and option D results from faulty fraction manipulation. The endpoint 14/3 is excluded because the original sign is strict.

Related tags

Linear InequalityAlgebraic SolutionFractionsClass 11Algebraic Solution Of Linear Inequalities In One VariableLinear InequalitiesMathematicsClass 11 Mcq

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