2000x*0.8=0.7(4+x) 做糊涂了
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2000x*0.8=0.7(4+x)做糊涂了2000x*0.8=0.7(4+x)做糊涂了2000x*0.8=0.7(4+x)做糊涂了2000x*0.8=0.7(4+x)1600x=2.8+0.7x(1
2000x*0.8=0.7(4+x) 做糊涂了
2000x*0.8=0.7(4+x) 做糊涂了
2000x*0.8=0.7(4+x) 做糊涂了
2000x*0.8=0.7(4+x)
1600x=2.8+0.7x
(1600-0.7)x=2.8
1599.3x=2.8
x=28/15993
题目呢
2000x*0.8=0.7(4+x) 做糊涂了
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