Question

QUESTION 8. An unknown number is added to 8. The sum is

then divided by 9 to give the answer 10. What is the unknown
number?​

Answer 1

82

Explanation:

Let the unknown number be x

If an unknown number is added to 8, this is expressed as;

8 + x

If The sum is then divided by 9 to give the answer 10, then;

(8+x)/9 = 10

Cross multiply

8 + x = 9 * 10

8 + x = 90

x = 90 - 8

x = 82

Hence the unknown number is 82