1*X+1*Y=9/80 8*X+10*Y=1怎么解

问题描述:

1*X+1*Y=9/80 8*X+10*Y=1怎么解

1*X+1*Y=9/80 ①
8*X+10*Y=1 ②
②-①×8,得10Y-8Y=1-9/10,则2Y=1/10,则Y=1/20
代入①,解得X=5/80=1/16