1.

Which of the following is a common solution of `3x-= 2` (mod 5) and `4x -= 0` (mod 6) ?A. 9B. 4C. 6D. 3

Answer» Correct Answer - A
Given `3x -= 2` (mod 5)
`rArr 3x - 2` is divisible by 5.
`x - 4` or 9 or 14, or ...........satisfies the above relations.
`4x -= 0` (mod 6)
`rArr 4x` is divisible by 6.
x = 3 or 9 or 15......... Satisfies the above relation.
`:.` The common solution of `3x -= 2` (mod 5) and `4x -= 0` (mod 6) is 9.


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