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tangquang2712
2 năm trước
Tìm x , y , a, m m x 1,3 - 0,4 x m = 9,18 ............................ ............................ ............................ 4,9 : x + 5,6 : x = 7 .............................. .............................. ( 249,6 - a ) : 54 = 4,3
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