x+1.3y=0.22,x+0.9y=1.6,求x,y 谢谢!要详细步骤
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x+1.3y=0.22,x+0.9y=1.6,求x,y 谢谢!要详细步骤
x+1.3y=0.22,x+0.9y=1.6,求x,y 谢谢!要详细步骤
x+1.3y=0.22,x+0.9y=1.6,求x,y 谢谢!要详细步骤
x+1.3y=0.22-------①
x+0.9y=1.6---------②
由①*50得:50x+65y=11--------③
由②*10得:10x+9y=16---------④
③-④*5得:65y-45y=-69
20y=-69
y=-69/20
带入④得:x=941/200
X+1.3Y=0.22 (1)
X+0.9Y=1.6 (2)
(1)-(2)得
0.4Y=-1.38
Y=-3.45
X=0.22-1.3Y=4.705
两式相减 0.4y=-1.38
y=-3.45
代入得x=4.705
x+1.3y=0.22 (1)
x+0.9y=1.6 (2)
(1)-(2) 0.4y=-1.38
y=-3.45 x=4.705
两式相减,得0.4Y=-1.38
Y=-3.45
代入X+1.3Y=0.22, X=4.705
这道题目也太诡异了点吧?。。。
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