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What is the lower bound for (x) in (2x-\frac{3}{5}\ge \frac{x}{2}+\frac{9}{10})?

Answer and explanation

Correct answer: \(x \ge 1\)

Multiply both sides by the positive number 10 to remove the fractions: \(20x-6\ge 5x+9\). Hence, \(15x\ge 15\), so \(x\ge 1\). The closest distractor, \(x>1\), is incorrect because at \(x=1\) both sides are equal, so 1 is included in the solution. Exam tip: multiplying an inequality by a positive number does not reverse its sign.

Related tags

Linear InequalitiesOne VariableFractional InequalitiesLower BoundAlgebraClass 11Algebraic Solution Of Linear Inequalities In One VariableMathematics

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