4

Set 2: Linear Equations

Explanation

Answer: A

If 15−2(x+1)=515- 2(x + 1) = 5, what is the value of xx?

A.

4

✓ Correct
B.

6

C.

5

D.

3

Detailed Explanation

Choice A is correct. Choice B is the correct answer. 1. Subtract 15: −2(x+1)=−10-2(x + 1) = -10 2. Divide by -2: x+1=5x + 1 = 5 3. Subtract 1: x=4x = 4 4. Verify: 15−2(5)=515- 2(5) = 5 ✓ Choice C is incorrect because it results from an error in the solution process. Choice D is incorrect because it results from an error in the solution process. Choice C is incorrect because it results from an error in the solution process.

Key Steps:

•

The correct answer is 4

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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