Question 3 Answer & Explanation - SAT Algebra

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algebra

Solve: $\frac{x}{2} + \frac{x}{5} = 7$

Correct Answer: D

Choice Choice D is the correct answer.

LCD: 10
Multiply by 10: $5x + 2x = 70$
Combine: $7x = 70$
Divide by 7: $x = 10$
Verify: $5 + 2 = 7$ ✓

Choice Choice B is incorrect because calculation error.

Choice Choice A is incorrect because calculation error.

Choice Choice C is incorrect because calculation error.

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