方程组4/x+2=3/y+1 3x-2y=1
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方程组4/x+2=3/y+1 3x-2y=1
方程组4/x+2=3/y+1 3x-2y=1
方程组4/x+2=3/y+1 3x-2y=1
4/x+2=3/y+1
4(y+1)=3(x+2)
4y+4=3x+6
3x-4y=-2 (1)
3x-2y=1 (2)
(2)-(1)
2y=3
y=3/2
x=(4y-2)/3=4/3
三角形则A+B=180-C
tan(A+B)=tan(180-C)
(tanA+tanB)/(1-tanAtanB)=-tanC
tanA+tanB=-tanC+tanAtanBtanC
tanA+tanB+tanC=tanAtanBtanC
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
解二元一次方程组3(x+y)-4(x-y)=4 x+y/2+x-y/6=1
解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1kkkkkkkk
解方程组3(x+y)-4(x-y)=4,x+y除以2+x-y除以6=1
一道二元一次方程组!3(x+y)-4(x-y)=4,(x+y)/2+(x-y)/6=1
解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1
解方程组{2(x-y)/3 - x+y/4=-1 6(x+y)-41(x-y)=12
解方程组8/(x+y) +(x-y)/2=3,6/(x+y)-(x-y)/4=1
解二元一次方程组:3(x+y)-4(x-y)=4,x+y/2+x-y/6+1x+y/2+x-y/6+1=1
二元一次方程组 2(X+Y)-(X-Y)=3 (X+Y)-2(X-Y)=1 解方程组二元一次方程组 2(X+Y)-(X-Y)=3 (X+Y)-2(X-Y)=1
2007x+2006y=4011 2006x+2007y=40153x-y=4+y x-3y=2/y-x-1 解方程组
解方程组:2/x+3/y=0.25 ,4/x+(x+2)/y=1
解下列方程组:5x+y/2=2x-4y/3=x+1
方程组y=2x-4 y=-3/4x+1有几解方程组y=-2x+2 y=-2x+5有几解
1/2x-2y=-74,x-6y=-12解方程组,x/5-y/2=2,2x+3y=4解方程组
5x=3y x-y=4 写出方程组的过程 1/2X=-2/3y 2x+y=7 写出方程组过程