The solution of the linear congruence 4x = 5(mod 9) is
A. 6(mod 9)
B. 8(mod 9)
C. 9(mod 9)
D. 10(mod 9)
Answer:A
The solution of the linear congruence 4x = 5(mod 9) is
A. 6(mod 9) B. 8(mod 9) C. 9(mod 9) D. 10(mod 9)
Explanation: The inverse of 5 modulo 9 is -2. Multiply by (-2) on both sides in equation 4x = 5(mod 9), it follows that x is congruent to 8(mod 9).