Respuesta :
Answer:
12 because 9+3 = 12 12 • 7 = 84
Step-by-step explanation:
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Answer:
the number is 3
Step-by-step explanation:
X= the number
7(x+9) = 84
7x+63 = 84
7x = 21
x=3
Check:
7(3+9) =84
7 x12 = 84
84=84