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(X+5.8)3=7.5

(x+5.8)÷3=7.5 x+5.8=22.5 x=22.5-5.8 x=16.7

x=5.8-3.7 x=2.1

5.9 11 7.8

2(X-3)=5.8 解:2(X-3)÷2=5.8÷2 X-3=2.9 X-3+3=2.9+3 X=5.9

2x+6=5.8 2x=5.8-6 2x=-0.2 x=-0.1

5.8x3表示(5.8个3或者3个5.8),5.8x0.3表示(5.8个0.3或者0.3个5.8) 请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!谢谢管理员推荐采纳!! 朋友,请【采纳答案】,您的采纳是我答题的动力,如果没有明白,请追问。谢谢。

x+3.2=5.8 x=5.8-3.2 x=2.6 ~回答完毕~ ~结果仅供参考~ ~\(^o^)/~祝学习进步~~~

7.42x3.2+7.42x3.2+7.4x5.8+7.42 =7.42×(3.2×2+1)+7.4x5.8 =7.42×7.4+7.4x5.8 =7.4×(7.42+5.8) =7.4×13.22 =97.828 3.83x0.32+0.38x6.8 =3.83×(0.32+0.68) =3.83×1 =3.83

5.8x3.2+6.8x5.8 =5.8x(3.2+6.8) =5.8x10 =58

(5.8x0.4+7.5x0.4)x2.5 =5.8x0.4x2.5+7.5x0.4x2.5 =5.8+7.5 =13.3

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