Question 10 Answer & Explanation - SAT Algebra

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algebra

A number is doubled, then 5 is added. The result is multiplied by 3 to get 39. What is the number?

Correct Answer: D

Choice Dhoice A is the correct answer.

Equation: $3(2x + 5) = 39$
Divide by 3: $2x + 5 = 13$
Subtract 5: $2x = 8$
Divide by 2: $x = 4$
Verify: $3(8 + 5) = 39$ ✓

Choice Dhoice D is incorrect because calculation error.

Choice Dhoice C is incorrect because calculation error.

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