AP ICET 2015 Paper

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Question : 106 of 200

Marks: +1, -0

A solution of

8x≡3(mod21)

is

1
3
7
9

Solution:

Given :

8x=3

(mod 21)

⇒8x-3

is divisible by 21
For

x=3,8x-3=21

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