Set 16: Linear Equations (Intermediate)

Explanation

Answer: B

Solve for $x$ : $\frac{x}{3} + \frac{x}{4} = 7$

✓ Correct

Detailed Explanation

Choice B is correct. Choice Ahoice B is the correct answer. 1. LCD: 12 2. Multiply by 12: $4x + 3 x = 84$ 3. Combine: $7x = 84$ 4. Divide by 7: $x = 12$ 5. Verify: $4+ 3 = 7$ ✓ 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. Choice Ahoice C is incorrect because it results from an error in the solution process.

Key Steps:

•

The correct answer is 12

Why others are wrong:

A: Choice A 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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