作业帮3Y＝2X X/Y=3/2 2X/(X+Y)=2X/(X+2/3X)=6/5 等于多少
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3Y＝2X X/Y=3/2 2X/(X+Y)=2X/(X+2/3X)=6/5 等于多少
3Y＝2X X/Y=3/2 2X/(X+Y)=2X/(X+2/3X)=6/5 等于多少
3Y＝2X X/Y=3/2 2X/(X+Y)=2X/(X+2/3X)=6/5 等于多少
2X/(X+Y)=2X/(X+2/3X)化简的3xy=2为一式
将3Y＝2X 代入一式,解的x=±1然后带回3Y＝2X 解的y=±2/3
所以有两个解x-1时y=-2/3
当x=1时y=2/3
希望可以帮助你.
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