5x+6y=61 3x+2y=27
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5x+6y=613x+2y=275x+6y=613x+2y=275x+6y=613x+2y=275x+6y=61(1)9x+6y=81(2)*3(2)*3-(1)4x=20x=5y=69x+6y=81
5x+6y=61 3x+2y=27
5x+6y=61 3x+2y=27
5x+6y=61 3x+2y=27
5x+6y=61 (1)
9x+6y=81 (2)*3
(2)*3-(1)
4x=20
x=5
y=6
9x+6y=81
4x=20
x=2
y=6
是要答案么?x=5,y=6
x=5,y=6
x=5,y=6
x=5,y=6
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
3x+5y-(x+y)=6 2(x+y)-3x=-7
把(x-y)看作一个整体,化解:5(x-y)+2(x-y)-4(x-y)= 3(x-y)把(x-y)看作一个整体,化解:5(x-y)+2(x-y)-4(x-y)=3(x-y)²-4(x-y)+7(x-y)-6(x-y)²=
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
{6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)