(x+y)/3=(x-y)/4 2x+3y=11
5个回答
x/3+y/3=x/4-y/4
x/12=-7y/12
x=-7y
代入2x+3y=11
-14y+3y=11
y=-1,x=7
相关问题
1.{x/3-y/2=1 3x-4y=11 2.{3x+2y=-2 x-y=-4
{4X+3Y=11 X+2Y=4}
根据3(x+y)-2(x-y)=11,4(x+y)+3(x-y)=9可得出x+y= ,x-y=
(1)2X-Y=1 3X-2Y =1 (2)4X-3Y=11 2X+Y=13 (3)3X+Y=1 1/2X+1/4Y=0
(1)2x+3y=16 3x-2y=11 (2)3x-4y=1 5x-6y=3
3/x+4/y=2 5x-y=11
{2x+y=11 3x+4y=29
解方程:2x+y+3z=11,3x+2y-2z=11,4x-3y-2z=4(过程)
2x+3y+z=0 3x+y-4z=11 x+y+z=-3
已知{2X-3Y=11,X+4Y=5,则3X+Y=