解方程组 2(x-1)+3(1+y)=2 4x-2(y+x)=11
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/08/27 11:02:25
解方程组 2(x-1)+3(1+y)=2 4x-2(y+x)=11
2x+y=13 7x+9y=84
就两个!拜托了!.
2x+y=13 7x+9y=84
就两个!拜托了!.
2(x-1)+3(1+y)=2 4x-2(y+x)=11
2x-2+3+3y=2 4x-2y-2x=11
2x+3y=1 (1) 2x-2y=11 (2)
(1)-(2) 5y=-10 y=-2
把y=-2,带入 2x+3y=1 2x=7 x=3.5
{x=3.5 y=-2
2x+y=13
y=13-2x
7x+9y=84
7x+9(13-2x)=84
7x+117-18x=84
11x=33 x=3
y=13-2×3=7
{x=3
y=7
2x-2+3+3y=2 4x-2y-2x=11
2x+3y=1 (1) 2x-2y=11 (2)
(1)-(2) 5y=-10 y=-2
把y=-2,带入 2x+3y=1 2x=7 x=3.5
{x=3.5 y=-2
2x+y=13
y=13-2x
7x+9y=84
7x+9(13-2x)=84
7x+117-18x=84
11x=33 x=3
y=13-2×3=7
{x=3
y=7
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=1
解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1
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x+y/3=x-y/4 2x+3y=11
解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27全过程、快
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27
要求 解方程组:{(X-1)(Y+1)=(X+1)(Y+1){X(2+Y)-6=Y(X-4)
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)