18 - 2x - x = 3
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bài tập tìm thành phần chưa biết lớp 3
- x 2 = 11
- (10 - x) * 2 = 4
- x + 81 = 9 * 10
- 260 - x = 107 * 2
- x * 5 = 120 - 0
- x + 259 = 15 * 23
- 78 - x = 18 * 2
- x * 3 = 35 - 2
- 3 * x = 5 * 6
- x * 7 = 140 - 2
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