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2024-05-24 15:59:36
Gọi số sách mà 2 lớp đã quyên góp lần lượt là x và y.
Ta có:
x/5,y/6 và x+y=121
Áp dụng tính chất dãy tỉ số bằng nhau:
x/5+y/6=x+y/5+6=121/11=11
x=5*11=55
y=6*11=66
Vậy 2 lớp lần lượt quyên góp được số sách là 55 và 66 quyển.
2024-05-22 19:38:43
is work
2024-05-22 19:37:55
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2023-12-21 22:12:57
Bằng 18,75 km/h
2023-12-21 22:11:42
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