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camtule0103
2 năm trước
1.tính tổng các số nguyên x,biết: a)-3<x<2 b)-789<x<789 2.tìm x thuộc z,biết: a)x+9=2-(+17) b)x-17=(-11)(-5) c)|x-5|=(-4)^2 d)2011+2010+2009+...+x=2011 giúp mik với
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