Question

What is the unknown number 15-9= And 9+?=15

Answer 1

The answer is 6.

Explanation:

Subtract 15 - 9 to get 6

Answer 2

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❖ The unknown number is 6.

15 - 9 = 6

To find the value of the second expression you can subtract 9 from both sides:

9 - 9 = 0

15 - 9 = 6

Therefore, ? = 6.

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