x/3+y/4=54/60 x/5+y/4=42/60

问题描述:

x/3+y/4=54/60 x/5+y/4=42/60

x/3+y/4=54/60
x/5+y/4=42/60
x/3+y/4=9/10
x/5+y/4=7/10
两式相减得2x/15=1/5
x=1.5
y=1.6