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What is the solution set of (-7<\frac{x+2}{3}\le 1)?

Answer and explanation

Correct answer: \(-23<x\le 1\)

Since 3 is positive, multiplying all three parts of the compound inequality by 3 does not reverse any inequality sign: \(-21<x+2\le 3\). Subtracting 2 throughout gives \(-23<x\le 1\). Hence, option C is correct. In option D, the open and closed endpoints have been reversed. Exam tip: An inequality sign reverses only when multiplying or dividing by a negative number.

Related tags

Linear InequalitiesCompound InequalitiesOne VariableFractional InequalitiesClass 11 AlgebraAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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