1800/x -2000/1.25x=1/12

问题描述:

1800/x -2000/1.25x=1/12

1800/x-1600/x=1/12
200/x=1/12
x=2400

1800/x -2000/1.25x=1/12
1800/x -1600/1x=1/12
200/x = 1/12
x=2400