若x/2=y/3=n/4不等于0,则下列各式中正确的是:A.(x+y)/5=n/4B.2x=3yC.(x+y+n)/9=1D.(y+4)/3=(n+3)/4

问题描述:

若x/2=y/3=n/4不等于0,则下列各式中正确的是:
A.(x+y)/5=n/4
B.2x=3y
C.(x+y+n)/9=1
D.(y+4)/3=(n+3)/4

C当然正确吧

x/2=y/3=n/4=k
x=2k;y=3k;n=4k
选A