SAT Math Question of the Day

Q: If 3x - 5 = 12x + 4, then x =

1. -1
2. -1/2
3. 0
4. 1/2
5. 1

UNANSWERED.

The correct answer is A.

A: The answer is -1.

3x - 5 = 12x + 4
- 5 = 9x + 4
- 9 = 9x
- 1 = x