{3(1-x)>2(x+9), x-3/0.5- 3.5x+1.4/0.7≤-14
{3(1-x)>2(x+9), x-3/0.5- 3.5x+1.4/0.7≤-14
解不等式组{3(1-x)>2(x+9),x-3/0.5- 3.5x+1.4/0.7≤-14
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