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What is the solution of 4 − x/2 > 1?

Answer and explanation

Correct answer: x < 6

The important concept is that multiplying or dividing an inequality by a negative number reverses its sign. From 4 − x/2 > 1, subtract 4 from both sides to obtain −x/2 > −3. Multiplying both sides by 2 gives −x > −6. Now multiply by −1; because the multiplier is negative, the inequality reverses: x < 6. Hence option A is correct. The boundary value x = 6 is excluded because the original sign is strict. Option B forgets the reversal caused by the negative coefficient, while C and D incorrectly include the boundary and/or use the wrong direction.

Related tags

Linear InequalitiesNegative CoefficientSign ReversalClass 11Algebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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