(A-1)/(B-1) = (4B)/(5A)求:A/B

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(A-1)/(B-1) = (4B)/(5A)求:A/B
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(A-1)/(B-1) = (4B)/(5A)求:A/B
(A-1)/(B-1) = (4B)/(5A)求:A/B

(A-1)/(B-1) = (4B)/(5A)求:A/B
小六奥数:(A-1)/(B-1) = (4B)/(5A)
即 A-1=4B
B-1=5A
解得 A= -5/19 ,B= -6/19,
所以 A/B= 5/6