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Hello,
as 3^(x+1)= 4 , 3^(2x-1) = (3^x)^2 / 3 = ?(1st)
(3^x)(3)= 4
3^x = 4 / 3 -----> substitute into (1st),
( 4/ 3) ^2 x (1/3) = 16 / 27 ~ 0.593
Thanks...