The sum of 5, 7, and a number amounts to 17. What is the number?
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"How to prove this ?
#2|k^2# then #2|k# for some #k\inZZ#"
1 Answer
Mar 2, 2018
The answer is 5.
Explanation:
You can find the unknown number by subtracting the two numbers that you know from the sum.
17 - 7 = 10
10 - 5 = 5
Therefore, the unknown number that completes the addition is 5.
