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Vlad [161]
2 years ago
5

Please help me on the question on the bottom

Mathematics
2 answers:
Mashcka [7]2 years ago
7 0
The answer is 4. Hope this helps you!
ratelena [41]2 years ago
4 0
Answer: 4

Step -by-step :
7+7+7=21
5+12+a=
17+a
21-17=4
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