已知x:y=2:3,且2分之2x+y-1=3分之x-y,求x,y的值.求救

问题描述:

已知x:y=2:3,且2分之2x+y-1=3分之x-y,求x,y的值.求救

x=2y/3 (4y/3+y-1)/2=(-y/3)/3
4y+3y-3=-2y/3
7y-3=-2y/3
21y-9=-2y
y=9/23