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If (x−1)/2 + (x−2)/3 ≤ (x+4)/6, what is the solution for x?

Answer and explanation

Correct answer: x ≤ 11/4

This is a one-variable linear inequality, and the least common denominator is 6. Since 6 is positive, multiplying every term by 6 preserves the ≤ sign. We obtain 3(x−1)+2(x−2) ≤ x+4. Expanding gives 3x−3+2x−4 ≤ x+4, so 5x−7 ≤ x+4. Subtracting x and adding 7 produce 4x ≤ 11, and division by the positive number 4 gives x ≤ 11/4. Therefore option A is correct. Option B reverses the inequality, option C incorrectly excludes the endpoint even though equality is permitted, and option D comes from an arithmetic error. The endpoint is included because the original relation is ≤.

Related tags

Linear InequalityFraction OperationsAlgebraic MethodClass 11Algebraic Solution Of Linear Inequalities In One VariableLinear InequalitiesMathematicsClass 11 Mcq

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