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Which is the correct solution of -2x < 8?

Answer and explanation

Correct answer: x > -4

The governing rule is that an inequality sign reverses whenever both sides are divided or multiplied by a negative number. Start with −2x<8. Divide both sides by −2: the left side becomes x and the right side becomes −4. Because −2 is negative, the symbol < changes to >, giving x>−4. A substitution check confirms the result: x=0 satisfies the original inequality because 0<8, and 0 is greater than −4. In contrast, x=−5 does not satisfy the original inequality because 10<8 is false, and −5 is not greater than −4. Option A forgets the sign reversal. Options C and D also use incorrect arithmetic or direction. Therefore option B is the unique correct solution set.

Related tags

Linear-InequalitiesNegative-DivisionAlgebraic-SolutionOne-Variable-InequalityAlgebraic Solution Of Linear Inequalities In One VariableLinear InequalitiesMathematicsClass 11 Mcq

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