a/b=d/c=f/e=3,a+2d-3f/b+2c-3e=
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a/b=d/c=f/e=3,a+2d-3f/b+2c-3e=a/b=d/c=f/e=3,a+2d-3f/b+2c-3e=a/b=d/c=f/e=3,a+2d-3f/b+2c-3e=∵a/b=d/c=f
a/b=d/c=f/e=3,a+2d-3f/b+2c-3e=
a/b=d/c=f/e=3,a+2d-3f/b+2c-3e=
a/b=d/c=f/e=3,a+2d-3f/b+2c-3e=
∵ a/b=d/c=f/e=3
∴a=3b,d=3c,f=3e
∴(a+2d-3f)/(b+2c-3e)
=(3b+2*3c-3*3e)/(b+2c-3e)
=3(b+2c-3e)/(b+2c-3e)
=3
A B C D E F*3=BCDEFA 问AB C D E F?
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计算:｛a,b,e｝∪｛c,d,e,f｝=?
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a/b=d/c=f/e=3,a+2d-3f/b+2c-3e=
若a/b=c/d=e/f=2/3,则(a+3c-e)/(b+3d-f)=________
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