Question

What algebraic equation reprsents "three times the difference of a number, x, and nine equals fifteen"

Choices:
A. 9x - 3 = 15
B. 3(9) - x = 15
C. 9 - 3x = 15
D. 3(x - 9) = 15

Please explain how you got your answer:

Answer 1

three (3) times (x) the difference of a number, x, and nine(x-9) equals (=) fifteen (15)
=> 3 (x-9) =15

Answer 2

Read as you do it :)
3(x-9) = 15
Solving it, you'd get
3x - 27 = 15
3x = 42
x = 14