X-Y=3(y-2),2(x-1)=5Y-18解下列方程组
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X-Y=3(y-2),2(x-1)=5Y-18解下列方程组X-Y=3(y-2),2(x-1)=5Y-18解下列方程组X-Y=3(y-2),2(x-1)=5Y-18解下列方程组x-y=3y-6x=4y-
X-Y=3(y-2),2(x-1)=5Y-18解下列方程组
X-Y=3(y-2),2(x-1)=5Y-18
解下列方程组
X-Y=3(y-2),2(x-1)=5Y-18解下列方程组
x-y=3y-6 x=4y-6
2x-2=5y-18
2(4y-6)-2=5y-18
8y-12-2=5y-18
3y=-4
y=-4/3
x=-16/3-6
x-y=3y-6 | 2x-2=5y-18
x+6=4y | 5y-2x=16
y=x/4+3/2 |5/4x-2x=3/2
| -3/4x=3/2
| x=-2
X-Y=3Y-6→X=4Y-6代入2(X-1)=5Y-18得出2(4Y-6-1)=5Y-18得Y=-4/3(负三分之四),再将Y=-4/3代入X=4Y-6得X=-34/3(负三分之三十四)
答案:X=-34/3 Y=4/3
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{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?
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x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
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x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
(3x-y)^2+(3x+y)(3x-y),x=1,y=-2
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
二元一次方程 :2(x+y)-(x-y)=3 (x+y)-2(x-y)=1
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
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