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If (x\in\mathbb{Z}) and (\frac{x-2}{3}\leq -1), what is the greatest possible (x)?

Answer and explanation

Correct answer: (-1)

The direct answer is option C, \(x=-1\). Start with \(\frac{x-2}{3}\le-1\). Since 3 is positive, multiplying both sides by 3 does not reverse the inequality: \(x-2\le-3\). Add 2 to both sides: \(x\le-1\). The question asks for the greatest possible integer, so the largest integer satisfying this condition is \(-1\). Option A, 1, is not allowed because \(1\le-1\) is false. Option B, 0, is also greater than -1 and fails. Option C, -1, satisfies the inequality exactly: \((-1-2)/3=-1\). Option D, -2, is a valid solution but is not the greatest one, because -1 is larger. Since the variable is restricted to integers, choose the endpoint integer. Remember: multiplying or dividing an inequality by a positive number keeps its direction; only a negative number reverses it.

Related tags

Integer-SolutionFractional-InequalityGreatest-Value

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