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What is the correct solution of 5(2x − 1) < 3x + 16?

Answer and explanation

Correct answer: x < 3

The governing principle is that ordinary algebraic operations preserve an inequality, while multiplication or division by a negative number reverses its sign. Expand the left side: 5(2x − 1) = 10x − 5, so 10x − 5 < 3x + 16. Subtract 3x from both sides to obtain 7x − 5 < 16. Add 5, giving 7x < 21. Since 7 is positive, division by 7 does not reverse the sign, and the result is x < 3. The boundary is excluded because the original symbol is strictly less than; x = 3 makes both sides equal to 25. Thus option A is correct, while B reverses the direction and C and D incorrectly include 3.

Related tags

Linear-InequalitiesBracket-ExpansionStrict-InequalityPositive-DivisionAlgebraic Solution Of Linear Inequalities In One VariableLinear InequalitiesMathematicsClass 11 Mcq

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