If 3x o 4 mod 5 find the least value of x - WAEC Mathematics 2018 Question
If 3x\(^o\) 4(mod 5), find the least value of x
A
1
B
2
C
3
D
4
correct option: c
3x \(\equiv\) 4(mod 5)
In modulo 5, multiples of 5 that give solution to the given equation are 5, 20, 35, 50,... but 5 will yield the leaast value of x.
Thus; 3x = 4 + 5 = 9
x = \(\frac{9}{3}\)
x = 3
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