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What is the solution of (4-\frac{2x+1}{3}\ge\frac{1-x}{2})?

Answer and explanation

Correct answer: x\le19

The relevant rule is that multiplication by a positive common denominator preserves the inequality direction. The denominators 3 and 2 have positive common denominator 6. Multiplying by 6 gives 24-2(2x+1)\ge3(1-x). Expanding both sides produces 24-4x-2\ge3-3x, so 22-4x\ge3-3x. Subtracting 3 gives 19-4x\ge-3x; adding 4x gives 19\ge x. Therefore x\le19, so option A is correct. The equality value x=19 is included because the original relation is non-strict. Options B and D reverse the direction, while option C introduces an erroneous factor of one-half during denominator clearing. A quick check at x=0 confirms the result: 4-1/3 is at least 1/2, so 0 belongs to the solution.

Related tags

Linear InequalitiesClass 11Positive DenominatorOne VariableAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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