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Nguyễn Linh Nhi
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0
2023-02-26 09:01:09
gọi số cần tìm là X.Ta có:
(X x 5 + 70):9 - 35=0
(X x 5 +70):9=0+35
X 5 + x70=35 x 9
X x 5= 315 + 70
X =385:5
X =77
2023-02-26 08:54:06
kết quả:2,625 hoặc là 21/8