600/(80-x)=2400/30 怎么解,
问题描述:
600/(80-x)=2400/30 怎么解,
答
1/(80-x)=4/30 4(80-x)=30 320-4x=30 4x=290 x=145/2
600/(80-x)=2400/30 怎么解,
1/(80-x)=4/30 4(80-x)=30 320-4x=30 4x=290 x=145/2