Find the least value of x which satisfies the equation 4x = 7(mod 9)
- 7
- 6
- 5
-
4
The correct answer is: D
Explanation
4x = 7 (mod 9)
4x = 7 + 9 (mod 9)
\(\frac{4x}{4} = \frac{16}{4}\) (mod 9)
x = 4