4

Set 5: Linear Inequalities (Intermediate)

Explanation

Answer: A

Solve: 4(x+2)>2(x8)-4(x + 2) > 2(x - 8)

A.

x<43x < \frac{4}{3}

✓ Correct
B.

x>43x > \frac{4}{3}

C.

x<4x < 4

D.

x>4x > 4

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Distribute and collect terms. 1. Distribute: 4x8>2x16-4 x - 8 > 2 x - 16 2. Add 4 x: 8>6x16-8 > 6 x - 16 3. Add 16: 8>6x8> 6 x 4. Divide by 6: 86>x\frac{8}{6} > x, which simplifies to 43>x\frac{4}{3} > x or x<43x < \frac{4}{3} Strategic Tip: Be careful with signs when distributing negatives. 4(2)=8-4(2) = -8. Choice B is incorrect because it reverses the inequality direction (should be x<x <). Choice C is incorrect because it might result from arithmetic errors like 6x<246x < 24. Choice D is incorrect because it combines wrong value and wrong direction.

Key Steps:

The correct answer is x<43x < \frac{4}{3}

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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