when the positive integer x is divided by 9 , the remainder is 5 . what is the remainder when 5 x is divided by 9 ?
"i tried plugging in numbers x = 9 q + 5 x = 14 5 x = 70 5 x / 9 = 63 + 7 remainder is 7 . answer is e ."
reminder(multiply(5, 5), 9)