这几道方程怎么解啊大X是未知数 小x是乘号1.2Xx0.9+[(2200-X)x1.15]x0.9=2331(X-15)x2-45分之X-15=一分之五4%X+(290-X)x5%=135-5分之50-X-5=3分之23分之2X+1 -1=6分之10X+1
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![这几道方程怎么解啊大X是未知数 小x是乘号1.2Xx0.9+[(2200-X)x1.15]x0.9=2331(X-15)x2-45分之X-15=一分之五4%X+(290-X)x5%=135-5分之50-X-5=3分之23分之2X+1 -1=6分之10X+1](/uploads/image/z/5176974-30-4.jpg?t=%E8%BF%99%E5%87%A0%E9%81%93%E6%96%B9%E7%A8%8B%E6%80%8E%E4%B9%88%E8%A7%A3%E5%95%8A%E5%A4%A7X%E6%98%AF%E6%9C%AA%E7%9F%A5%E6%95%B0+%E5%B0%8Fx%E6%98%AF%E4%B9%98%E5%8F%B71.2Xx0.9%2B%5B%282200-X%29x1.15%5Dx0.9%3D2331%28X-15%29x2-45%E5%88%86%E4%B9%8BX-15%3D%E4%B8%80%E5%88%86%E4%B9%8B%E4%BA%944%25X%2B%EF%BC%88290-X%EF%BC%89x5%25%3D135-5%E5%88%86%E4%B9%8B50-X-5%3D3%E5%88%86%E4%B9%8B23%E5%88%86%E4%B9%8B2X%2B1+-1%3D6%E5%88%86%E4%B9%8B10X%2B1)
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