Set 13: Linear Equations (Intermediate)

Explanation

Answer: D

A number multiplied by 3 and increased by 5 is equal to the same number doubled and increased by 12. What is the number?

3.5

✓ Correct

Detailed Explanation

Choice D is correct. Choice Ahoice D is the correct answer. 1. Equation: $3x + 5 = 2 x + 12$ 2. Subtract 2 x: $x + 5 = 12$ 3. Subtract 5: $x = 7$ 4. Verify: $21+ 5 = 26$ and $14+ 12 = 26$ ✓ Choice Ahoice C is incorrect because it results from an error in the solution process. Choice Ahoice D is incorrect because it results from an error in the solution process. Choice Ahoice C is incorrect because it results from an error in the solution process.

Key Steps:

•

The correct answer is 7

Why others are wrong:

A: Choice A is incorrect and may result from a calculation error.

B: Choice B is incorrect and may result from a calculation error.

C: Choice C is incorrect and may result from a calculation error.

← Previous Next →

🎯 Keep Practicing!

Master all sections for your best SAT score

📚Reading & Writing→📖Vocabulary→