设ä¸è§ç¡¬å¸Xæï¼äºè§ç¡¬å¸Yæï¼åæ ¹æ®é¢ææ
X+Y=50 ï¼1ï¼
ä¸æ0.1X+0.5Y=18.6 ï¼2ï¼
ï¼1ï¼å¼ç§»é¡¹æY=50-Xï¼ä»£å
¥ï¼2ï¼å¼æ
0.1X+0.5(50-X)=18.6
å³0.1X+25-0.5X=18.6
æ25-0.4X=18.6
移项æ0.4X=25-18.6=6.4
åX=6.4÷0.4=16
Y=50-X=50-16=34
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