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Thanhtung Phan
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2023-11-04 18:57:37
- 27 + (- x) = -104
-27 -x = -104
Đổi dấu hết 2 vế
27 + x = 104
x = 104 - 27
x = 77
2023-11-04 18:51:03
2022-04-02 16:31:41
2022-03-04 10:20:43
2022-03-04 04:34:17
2022-01-12 14:57:57