Question 1144973
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When n is divided by 4, the remainder is 3 (given).


Hence, when 3n is divided by 4, the remainder is 3*3 = 9, which is EQUIVALENT to the remainder 1 modulus 4.


It implies, that when (3n-1) is divided by 4, the remainder is 0.     <U>ANSWER</U>



<U>Example</U>.  Let n = 7,    giving the remainder 3 when divided by 4.

          3n = 21,      giving the remainder 1 when divided by 4.

          (3n-1) = 20,  giving the remainder 0 when divided by 4.
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