解方程组y=1-x3x+2y=5

从p26到p33的答案真的不回做解方程组y=2/3x3x-4y=2x+2y=03x+4y-6=03x+2y=-23x-y=46x+7y=-195y-6x=-17s+2t=03s=t-10=0x/3-x/4=1x/2+y/3=2从p26到p3

问几道数学题目初一下册的校园代入法用代入法解下列方程组4x-3y=17y=7-5x3x+5y=82x-y=13x-5y=112(3x-5y)+3y=17说出思路谢谢,用消元代入法解问几道数学题目初一下册的校园代入法用代入法解下列方程组4x-

把下列方程写成用含X的式子表示Y的形式2x-y=3-y=3-2xy=3+2x3x+y-1=0y=1-3x把下列方程写成用含X的式子表示Y的形式2x-y=3-y=3-2xy=3+2x3x+y-1=0y=1-3x把下列方程写成用含X的式子表示Y

解方程组：x/3+y/5=13(x+y)+2(x-3y)解方程组：x/3+y/5=13(x+y)+2(x-3y)=45解方程组：x/3+y/5=13(x+y)+2(x-3y)解方程组：x/3+y/5=13(x+y)+2(x-3y)=45解方

解方程组:x+y=2x+y+1=5x+2y+1解方程组:x+y=2x+y+1=5x+2y+1解方程组:x+y=2x+y+1=5x+2y+1解得答案是x=-1;y=3x+y=2x+y+1x=-12x+y+1=5x+2y+13x+y=0y=-3

解二元一次方程组x+y=31/2(x+y)-3y=5解二元一次方程组x+y=31/2(x+y)-3y=5解二元一次方程组x+y=31/2(x+y)-3y=5解将x+y=3代入1/2(x+y)-3y=5∴1/2×3-3y=5∴3y=3/2-5

2+3x/5+4y=9,4+6y-y=1解方程组2+3x/5+4y=9,4+6y-y=1解方程组2+3x/5+4y=9,4+6y-y=1解方程组由(2+3x)/(5+4y)=9得,2+3x=45+36y,即3x-36y=43由4+6y-y=

二元一次方程组1~解这个方程组：x+3y/2=3/55（x-2y）=-4解这个方程组：x+3y/2=3/55（x-2y）=-4若二元一次方程组x+y=2的解也是二元一次方程3x-y=-6的解,求a的值.4x+(a/3)y=1,已知y=x+p

解方程组(x+y)(x-2y)=-5(x-y)(x+2y)=7解方程组(x+y)(x-2y)=-5(x-y)(x+2y)=7解方程组(x+y)(x-2y)=-5(x-y)(x+2y)=7展开x^2-2y^2-xy=-5x^2-2y^2+xy

解方程x+3x+2x3x=2700解方程x+3x+2x3x=2700解方程x+3x+2x3x=2700x+3x+2x3x=270010x=2700x=270×+3×+2×3×=2700×=270（不知道我算的对不对）

解方程组{(x-2)(y+3)=(x+1)(y-1){(x+1)(y+1)=(x-1)(y+5)解方程组{(x-2)(y+3)=(x+1)(y-1){(x+1)(y+1)=(x-1)(y+5)解方程组{(x-2)(y+3)=(x+1)(y-

解方程组3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1解方程组3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1解方程组3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1两式相加得：8(x+y)

解方程组:{3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1}解方程组:{3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1}解方程组:{3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1}3﹙x

解方程组6(x-y)-7(x+y)=212(x-y)-5(x+y)=-1解方程组6(x-y)-7(x+y)=212(x-y)-5(x+y)=-1解方程组6(x-y)-7(x+y)=212(x-y)-5(x+y)=-1①6（x-y）-7（x+

3/(X-Y)+10/(X+Y)=-52/(X-Y)-15/(X+Y)=1解分式方程组3/(X-Y)+10/(X+Y)=-52/(X-Y)-15/(X+Y)=1解分式方程组3/(X-Y)+10/(X+Y)=-52/(X-Y)-15/(X+Y

1/2x-2y=-74,x-6y=-12解方程组,x／5-y／2=2,2x+3y=4解方程组1/2x-2y=-74,x-6y=-12解方程组,x／5-y／2=2,2x+3y=4解方程组1/2x-2y=-74,x-6y=-12解方程组,x／5

解方程组：{3|x|-2y=82|x|+5y-1}解方程组：3|x|-2y=82|x|+5y-1解方程组：{3|x|-2y=82|x|+5y-1}解方程组：3|x|-2y=82|x|+5y-1解方程组：{3|x|-2y=82|x|+5y-1

数学问题,解方程组解方程组X^2-5X-Y^2+5Y=0X^2+XY+Y^2=49谢谢!X^2代表x的2次方数学问题,解方程组解方程组X^2-5X-Y^2+5Y=0X^2+XY+Y^2=49谢谢!X^2代表x的2次方数学问题,解方程组解方程

解方程组:3x-5y=8,6x+7y=-1解方程组：x/3+y/2=0,2(3x-4)-3(y-1)=43解方程组:3x-5y=8,6x+7y=-1解方程组：x/3+y/2=0,2(3x-4)-3(y-1)=43解方程组:3x-5y=8,6

利用图像解方程组解方程组2x-y=1,x+2y=3利用图像解方程组解方程组2x-y=1,x+2y=3利用图像解方程组解方程组2x-y=1,x+2y=3{2x-y=1x+2y=3x2:4x-2y=2+:4x-2y+x+2y=2+35x=5x=