帮忙解一些方程组(1)3x-2y=6 2x+3y=17 (2)5x+6y=15.2 3x-2y=-0.4(3)2(x+y

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/10 12:47:27

帮忙解一些方程组
(1)3x-2y=6 2x+3y=17
(2)5x+6y=15.2 3x-2y=-0.4
(3)2(x+y)-3y=7 4(x-9)=3(y-2)
(4)3(x+y)-4(x-y)=4 x+y/2+x-y/6=1

1.
6x-4y=12
6x+9y=54
y=3,x=(6+2y)/3=4
2.
5x+6y=15.2
9x-6y=-1.2
x=1
y=(3x+0.4)/2=1.7
3.
4x-2y=14
4x-3y=30
y=-16
x=(14+y)/2=-1
4.
-x+7y=4
2x+y/3=1
-2x+14y=8
2x+y/3=1
43/y=9,y=43/9
x=7y-4=265/9

帮忙解一些方程组(1)3x-2y=6 2x+3y=17 (2)5x+6y=15.2 3x-2y=-0.4(3)2(x+y 解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4 解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2 解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 解方程组：x+y/2+x-y/3=6 4(x+y)-5(x-y)=12 2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1 解方程组﹛2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 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)-4(x-y)=4,x+y/2+x-y/6+1