A.X × 5 = 40X = 40
Câu 2.a.x × 5 = 40x = 40 : 5x = 8b.x : 4 = 5x = 5 × 4x = 20c.x − 4 = 6x = 6 + 4
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x = 10Trang chủ:
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x = 10