3 years ago

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

Mathematics

1 answer:

Rudik [331]3 years ago

3 0

Answer:

Step-by-step 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

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