解方程{3x+4y=20,4y+3y=22
解方程{3x+4y=20,4y+3y=22
解方程x+y+(x+y/2)=15 3x+5y+4(x+y/2)=62
(2y-3)(-y+4)=(y-2)(y-5)-3y(y-7/3)解方程
已知方程4x+3y=-14,当x=y时,y=几
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
解方程:{2x+3y+z=7,x+y+z=4,3x+y-z=-4
解方程:2X+3Y=34 3X+4Y=48 X= Y=
解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6
解方程(3x+2y)/4=x+1/3y=3(x-2)+y
解方程:3x+2y/4=2x+y/5=x-y+1/6要详细过程