Set 14: Linear Equations (Intermediate)

Explanation

Answer: A

A number is doubled, then 5 is subtracted, result is 15. What is the number?

✓ Correct

7.5

Detailed Explanation

Choice A is correct. Choice B is the correct answer. 1. Equation: $2x - 5 = 15$ 2. Add 5: $2x = 20$ 3. Divide by 2: $x = 10$ Choice D is incorrect because it results from an error in the solution process. Choice B 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 10

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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