5 ,5,6,8,10 89x4,4.5,5,5.2,6,7.2 ,8,10 108x4丶4.5,5,6
2 2 x=5.2 13.5x=27 x=2 21-18=5x x=3÷5 x=0.
2014-11-18 最佳答案 3(x_5.2)=5.4 x-5.2=1.
湖南长沙露营装备168就能获得精致露营72
4.5x12.6-3.6x4.5 4.5的简便计算
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