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What is the solution of \(9-2(4x-3)<5(x+2)\)?

Answer and explanation

Correct answer: \(x>\frac{5}{13}\)

First expand both sides carefully. The left side is \(9-2(4x-3)=9-8x+6=15-8x\), while the right side is \(5(x+2)=5x+10\). Thus \(15-8x<5x+10\). Subtracting 10 gives \(5-8x<5x\), and adding \(8x\) gives \(5<13x\). Since 13 is positive, division preserves the inequality sign, yielding \(x>5/13\). Therefore option A is correct. The other options either reverse the direction, replace the strict inequality by a non-strict one, or state the opposite solution set. The endpoint \(5/13\) itself is excluded because the original relation is strictly less than.

Related tags

Linear InequalitiesBracket SimplificationStrict InequalityAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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