Question

if the remainder when the integer n is divided by 9 is 7, then the remainder when 3n- 1 is divided by 9 is?

Answer 1

Answer:

20

Step-by-step explanation:

n = 9x + 7

if 3n -1 is divied by 9 then..

3(n) = 3{(9x) + 7 }

3n = 27x + 21

and,

3n -1 = 27x + 21-1

= 27x + 20

= 9(3x) + 20

So we can conclude that remainder is 20

mark me as the brainliest...