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(1-15%)x+(80000-x)乘(1-12%)=69440
人气:243 ℃ 时间:2020-10-01 00:54:09
解答
楼主你好
0.85x+0.88(80000-x)=69440
0.85x+70400-0.88x=69440
0.85x-0.88x=69440-70400
-0.03x=-960
x=32000
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