7
algebra

Solve: 2x1+392|x - 1| + 3 \leq 9

A

2x4-2 \leq x \leq 4

B

4x2-4 \leq x \leq 2

C

x4x \leq 4

D

x2x \leq -2 or x4x \geq 4

Correct Answer: A

Choice A is the correct answer. Isolate and solve.

  1. Subtract 3: 2x162|x - 1| \leq 6
  2. Divide by 2: x13|x - 1| \leq 3
  3. Compound: 3x13-3 \leq x - 1 \leq 3
  4. Add 1: 2x4-2 \leq x \leq 4

?�� Strategic Tip: Treat ...|...| as a variable until it is isolated.

Choice B is incorrect because it solves incorrectly. Choice C is incorrect because it misses the lower bound. Choice D is incorrect because it treats it as an "or" inequality.