..快60页的{x/2=y/3=z/4}{x+2y+3Z=80}

令x/2=y/3=z/4=a
所以x=2a
y=3a
z=4a
代入x+2y+3z=80
2a+6a+12a=80
20a=80
a=4
所以
x=2a=8
y=3a=12
z=4a=16