(1-4/9)x+(100-x)×(1-2/7)=60 说 清楚 怎么解,
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(1-4/9)x+(100-x)×(1-2/7)=60说清楚怎么解,(1-4/9)x+(100-x)×(1-2/7)=60说清楚怎么解,(1-4/9)x+(100-x)×(1-2/7)=60说清楚怎么
(1-4/9)x+(100-x)×(1-2/7)=60 说 清楚 怎么解,
(1-4/9)x+(100-x)×(1-2/7)=60 说 清楚 怎么解,
(1-4/9)x+(100-x)×(1-2/7)=60 说 清楚 怎么解,
(1-4/9)x+(100-x)×(1-2/7)=60
5x/9+500/7-5x/7=60
35x+4500-45x=3780
720-10x=0
x=720÷10
x=72
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