(3/5)^x=7^(1-x)对指数题,求X,

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(3/5)^x=7^(1-x)对指数题,求X,(3/5)^x=7^(1-x)对指数题,求X,(3/5)^x=7^(1-x)对指数题,求X,(3/5)^x=7/7^x(3/5)^x·7^x=7(21/5

(3/5)^x=7^(1-x)对指数题,求X,
(3/5)^x=7^(1-x)
对指数题,求X,

(3/5)^x=7^(1-x)对指数题,求X,
(3/5)^x=7/7^x
(3/5)^x·7^x=7
(21/5)^x=7
x=log(21/5)7=log(4.2)7