Math, asked by Muffy4230, 1 year ago

A positive integer n when divided by 9 gives 7 as remainder what will be the remainder when 3 and minus 1 is divided by 9

Answers

Answered by Acceber
1

Answer:

Remainder = 2.

Step-by-step explanation:

Given A positive integer n is divided by 9 gives 7 as the remainder.

Let a be quotient

n = 9a+7

3n-1 is divided by 9

now, 3n-1= 3(9a+7)-1

 =27a + 21-1

 =27a +20  = 27 a + 18 +  2

= 9( 3a + 6) + 2 when divided by 9

Remainder = 2.

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