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What is the solution of the inequality \(8x-3\ge 5x+18\)?

Answer and explanation

Correct answer: \(x\ge 7\)

Subtracting \(5x\) from both sides gives \(3x-3\ge 18\). Adding 3 to both sides yields \(3x\ge 21\), and dividing by 3 gives \(x\ge 7\). Therefore, option A is correct. Option B reverses the inequality without justification; the inequality sign changes direction only when multiplying or dividing by a negative number. Exam tip: Always check whether the number used for multiplication or division is negative.

Related tags

Linear InequalitiesOne VariableAlgebraic SolutionClass 11Algebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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