Tìm các chữ số a,b,c sao cho:a nhân bc =145
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TN
0
NT
1
15 tháng 6 2016
Ta có: a + b + 8 chia hết cho 3
và a - b =3
Vậy a =8 và b =5
T
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0
a=5
b=2
c=9