3
Answer: ASet 8: Linear Inequalities (Intermediate)
Explanation
Solve:
A.
✓ Correct
B.
C.
D.
Detailed Explanation
Choice A is correct. Choice A is the correct answer. Distribution and multi-step solving are combined in this problem. 1. Distribute: , giving 2. Subtract 5 x: , giving 3. Add 8: Strategic Tip: When distributing with parentheses, multiply the coefficient by EVERY term inside. Choice B is incorrect because it reverses the inequality without justification. Choice C is incorrect because it uses -10 instead of 10, possibly from a sign error. Choice D is incorrect because it combines both wrong sign and wrong direction.
Key Steps:
•
The correct answer is
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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