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Solve the inequality (3(1-x)-2(4-3x)>5x-10).

Answer and explanation

Correct answer: \(x<\frac{5}{2}\)

Simplifying the left-hand side gives \(3(1-x)-2(4-3x)=3-3x-8+6x=3x-5\). Thus, \(3x-5>5x-10\), which gives \(5>2x\). Since 2 is positive, dividing both sides by 2 does not reverse the inequality sign, so \(x<\frac{5}{2}\). The option \(x\le \frac{5}{2}\) is incorrect because equality is not included in the original inequality. Exam tip: while expanding brackets, multiply \(-2\) by every term in the second bracket.

Related tags

Linear InequalitiesOne VariableAlgebraic SimplificationBracket ExpansionClass 11 MathematicsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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