x+y=95
y=95-x
0.4x+0.78y=0.6x+0.6y
0.2x=0.18y
10x=9y
10x=9(95-x)
10x=855-9x
10x+9x=895
19x=895
x=45
y=95-45=50
如追加其它问题,采纳本题后点击想我求助,
x+y=95 0.4x+0.78y=0.6x+0.6y
2个回答
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