6/(y+5)=6/(4y+20)+2

6/(y+5)=6/(4y+20)+2
6/(y+5)=(6/4)/(y+5)+2
6/(y+5)=[(6/4)+2(y+5)]/(y+5)
∵y+5是分母
∴y+5≠0
两边同乘以y+5
6=6/4+2(y+5)
一元一次方程就好算了
y=-11/4

11/4

y=-11/4

6[(4y+20)+2]=6(y+5)
6(4y+20)+12=6y+30
24y+120+12-6y-30=0
18y=-120-12+30
18y=-102
y=-102/18
y==-17/3

6/(y+5)=6/4(y+5)+26/(f+5)=3/2(y+5)+2 12=3+4(y+5)
12=3+4y+20
4y+23=12
4y=-11
y=-11/4