x(1+30%)+(200-x)(1+20%)x90%-200=27.7

来源：学生作业帮助网编辑：作业帮时间：2024/11/06 13:35:30

x(1+30%)+(200-x)(1+20%)x90%-200=27.7
x(1+30%)+(200-x)(1+20%)x90%-200=27.7

x(1+30%)+(200-x)(1+20%)x90%-200=27.7
90%前面的哪个是乘号还是x,如果是乘号的话
1.3x+1.2*0.9*（200-x）=227.7
0.22x=11.7
x=53.18

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