3- Read the following SAT test question, then click on a button to select your answer.

If N · 5 over 14 = 5 over 14 · 7 over 9 , then N =

A. click to choose answer A 7 over 9
B. click to choose answer B 9 over 7
C. click to choose answer C 5
D. click to choose answer D 7
E. click to choose answer E 14

Alıntı: Collegeboard

Answer Key: "A"

* Here's Why:

If N · 5 over 14 = 5 over 14 · 7 over 9, then by the commutative property of multiplication, N · 5 over 14 = 7 over 9 · 5 over 14. Multiplying each side of the latter equation by 14 over 5 gives N · 1 = 7 over 9 · 1, so N = 7 over 9.
* Difficulty: Easy
* Question Type: Standard Multiple Choice
(Mathematics)