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

2025-01-06 11:18:22
推荐回答(3个)
回答1:

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

回答2:

x:y=2:3,2y=3x,y=3x/2
(2x+y-1)/2=(x-y)/3,
(2x+3x/2-1)*3=2x-3x
21x/2-3+x=0
x=2/23
y=3/23

回答3:

x:y=2:3可得 y=3/2*x 带入2分之2x+y-1=3分之x-y,可得
x=6/23 y=9/23