a/b=c/d=e/f=3/5,则a+c/b+d=___,a+2c-3e/b+2d-3f=____

a/b=c/d=e/f=3/5,则a+c/b+d=___,a+2c-3e/b+2d-3f=____
a/b=c/d=e/f=3/5,则a+c/b+d=___,a+2c-3e/b+2d-3f=____

a/b=c/d=e/f=3/5,则a+c/b+d=___,a+2c-3e/b+2d-3f=____
由已知得：a=（3/5）b,c=（3/5）d,e=（3/5）f
带入得：
（a+c）/（b+d）=3/5(b+d)/(b+d)=3/5
(a+2c-3e)/(b+2d-3f)=3/5(b+2d-3f)/(b+2d-3f)=3/5