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dung1976
2 năm trước
tìm các chữ số a,b để G=20a4b chia hết cho 45. D=26a3b chia hết cho 5 và 18 C=10a5b chia hết cho 45 H=15a5b chia hết cho 5 và 18. mọi người giúp em với ạ!
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