5

Set 2: Linear Inequalities

Explanation

Answer: A

Solve: x32<x4+1\frac{x}{3} - 2 < \frac{x}{4} + 1

A.

x<36x < 36

✓ Correct
B.

x>36x > 36

C.

x<12x < 12

D.

x>12x > 12

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Eliminate fractions by multiplying by the Least Common Multiple (LCM) of the denominators. 1. LCM of 3 and 4 is 12: Multiply every term by 12. 2. Multiply: 12(x3)12(2)<12(x4)+12(1)12(\frac{x}{3}) - 12(2) < 12(\frac{x}{4}) + 12(1) 3. Simplify: 4x24<3x+124x - 24 < 3 x + 12 4. Subtract 3 x: x24<12x - 24 < 12 5. Add 24: x<36x < 36 Strategic Tip: Clearing fractions early reduces calculation errors. Multiply EVERY term, including constants. Choice B is incorrect because it reverses the inequality direction. Choice C is incorrect because it might come from not multiplying the constants by 12. Choice D is incorrect because it combines wrong value and wrong direction.

Key Steps:

The correct answer is x<36x < 36

Why others are wrong:
B: Choice B is incorrect and may result from a calculation error.
C: Choice C is incorrect and may result from a calculation error.
D: Choice D is incorrect and may result from a calculation error.

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