解方程组:(1)3x+2y=-1,x+4y=-7;(2)x+4y=14,(x-3)/4-(y-3)/3=1/12,用代入消元法(3)(x+y)/2+(x-y)/3=6,2(x+y)-3x+3y=24 用代入消元法
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解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组解方程组{y=2x-7{x+y+z=1{3x-z=4
4/3(x+y)=160 1/2x=3/2y 解方程组
4/3(X+Y)=160 1/2X=3/2Y 解方程组
解二元一次方程组 1){4x-y=1,y=2x+3
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
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
解方程组:4(x+1)=3(y+3) x-2y=7y-6x/3
解方程组:2/x+3/y=0.25 ,4/x+(x+2)/y=1
2(x+y)-(x-3y)=13 4(x+y)+3(x-3y)=1解方程组 2(x+y)-(x-3y)=13 4(x+y)+3(x-3y)=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
利用图像解方程组解方程组2x-y=1,x+2y=3