Set 7: Linear Equations (Advanced)

Explanation

Answer: D

If $4x + 15 = 9x - 10$ , what is the value of $x$ ?

✓ Correct

Detailed Explanation

Choice D is correct. Choice D is the correct answer. 1. Subtract 4 x: $15= 5 x - 10$ 2. Add 10: $25= 5 x$ 3. Divide by 5: $5= x$ 4. Verify: $4(5) + 15 = 35$ and $9(5) - 10 = 35$ ✓ 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 C 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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