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Giúp mk mấy câu này vs ạ!! 1. Tìm x, bt a) 2.x-138= 2 mũ 3 nhân với 3 mũ 2 b) 231-( x-6) = 1339: 13 c) 70-5. ( x-3) = 45 d) 10=2.x= 4 mũ 5: 4 mũ 3 2.T
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