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What is the solution of x/4 ≤ 3?

Answer and explanation

Correct answer: x ≤ 12

The governing concept is preserving an inequality while multiplying by a positive number. Start with x/4 ≤ 3. Multiply both sides by 4: 4(x/4) ≤ 4(3), which simplifies to x ≤ 12. Therefore option A is correct. The sign remains unchanged because 4 is positive. The boundary is included because the original relation is ≤; substituting x = 12 gives 12/4 = 3, so equality is satisfied. Values smaller than 12 also work, such as x = 8, which gives 2 ≤ 3. Option B incorrectly reverses the sign, while options C and D confuse multiplying by 4 with dividing by 4 or use the wrong direction. Hence the complete solution set is all real numbers less than or equal to 12.

Related tags

Linear InequalitiesFraction InequalityPositive MultiplierClass 11 MathematicsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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