Congrats on your first question!
Answer: The numbers are 13 and 10.
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Note: This (1) means equation 1 and so on.
n= a number
y= another number
n+y=23 (1)
n-y=3 (2)
If we add these systems of equations together, we get:
2n=26
If we divide each side by 2, we get:
n=13.
If we insert this into equation 1, we get
13+y=23
y=10.
Therefore, the numbers are 13 and 10.