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hiepn2061
2 năm trước
Bài 6: 1)A=23.x-35.y biết x=-8,y=-5 2)B=(69-85).x-(-28+47).y với x=4,y=-5 3)C=(12-46)x+(-35+58).y với x=-3,y=-6 4)D=(68-87).x-(-26+49).y với x=5,y=-6
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