解: 3/5x=2/3y ①x+y+z=62 ②y=3/4z ③厅芦陆把y=3/4z 代入① 得扮顷3/5 x=2/3 *3/4 zx=1/2 z*5/3x=5/6*z把x=5/6*z, y=3/4z 代入② 得5/6 z+3/4 z+z=62(10/12+9/12+1)*z=6231/哗握12*z=62z=62*12/31z=24x=5/6*24=20y=3/4*24=18解得x=20, y=18, z=24.
3/5x=2/3y x+y+z=62 y=3/4z
Simone
发布于 2023-08-19 19:05:06
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