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If ( 4x-7\leq 2x+1 ) and (x\in \mathbb{N}), what is the greatest (x)?

Answer and explanation

Correct answer: 4

Solving the inequality, \(4x-7\leq 2x+1\) gives \(2x\leq 8\), hence \(x\leq 4\). Since \(x\) is a natural number, the greatest natural number satisfying the condition is \(4\). Option 5 is incorrect because substituting \(x=5\) does not satisfy the inequality. Exam tip: Bring variable terms to one side and constants to the other before checking the boundary value.

Related tags

Linear InequalitiesNatural NumbersOne VariableAlgebraic SolutionBoundary ValueAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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