Set 4: Linear Equations

Explanation

Answer: D

Solve: $3(2x) + 4x = 50$

✓ Correct

Detailed Explanation

Choice D is correct. Choice D is the correct answer. 1. Simplify: $6x + 4 x = 50$ 2. Combine: $10x = 50$ 3. Divide: $x = 5$ 4. Verify: $3(10) + 20 = 50$ ✓ Choice C 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 B is incorrect because it results from an error in the solution process.

Key Steps:

•

The correct answer is 5

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.

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