已知a/b=c/d=e/f=3,求(a+3c-e)/(b+3d-f)的值:若b+d+f=4,求a+c+e的值.

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已知a/b=c/d=e/f=3,求(a+3c-e)/(b+3d-f)的值:若b+d+f=4,求a+c+e的值.已知a/b=c/d=e/f=3,求(a+3c-e)/(b+3d-f)的值:若b+d+f=4

已知a/b=c/d=e/f=3,求(a+3c-e)/(b+3d-f)的值:若b+d+f=4,求a+c+e的值.
已知a/b=c/d=e/f=3,求(a+3c-e)/(b+3d-f)的值:若b+d+f=4,求a+c+e的值.

已知a/b=c/d=e/f=3,求(a+3c-e)/(b+3d-f)的值:若b+d+f=4,求a+c+e的值.
已知a/b=c/d=e/f=3,求(a+3c-e)/(b+3d-f)的值:若b+d+f=4,求a+c+e的值
(a+3c-e)/(b+3d-f)
=(3b+9d-3f)/(b+3d-f)
=3(b+3d-f)/(b+3d-f)
=3
(a+c+e)/(b+d+f)
=(3b+3d+3f)/(b+d+f)
=3
若b+d+f=4,则 a+c+e=12