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Which number line representation is equivalent to (7-3x>1)?

Answer and explanation

Correct answer: (x<2), open dot at (2) shaded left

The direct answer is option A: x<2, with an open point at 2 and shading to the left. Solve 7-3x>1. Subtract 7 from both sides: -3x>-6. Divide by -3; division by a negative number reverses the inequality, giving x<2. Since 2 itself is not allowed, the point at 2 is open. Values smaller than 2, such as 0, satisfy the inequality, so the shading goes left. Option A shows exactly this. Option B has the wrong direction because it says x>2. Option C includes 2, although strict > does not permit equality. Option D has both the wrong direction and an included endpoint. The key rule is that multiplying or dividing an inequality by a negative number reverses its sign.

Related tags

Linear InequalitiesSign ReversalNumber Line

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