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Finger [1]
2 years ago
12

Set up equations and solve them to find the unknown numbers in the following cases:

Mathematics
1 answer:
noname [10]2 years ago
3 0

Answer:

the answer is 21

Step-by-step explanation:

the number she thinks of is 21 add 21 + 19 to get 40.

divide 40 by 5 to get 8.

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