when the positive integer x is divided by 9 , the remainder is 5 . what is the remainder when 7 x is divided by 9 ?
i tried plugging in numbers x = 9 q + 5 x = 14 7 x = 98 7 x / 9 = 9 * 10 + 8 remainder is 8 answer is e .
reminder(multiply(5, 7), 9)