Question 1048183

a)  (3/5)^x+1  =  25/9
(3/5)^x  =  16/9
x*log(0.6) = 16/9
x = 16/(9*log(0.6))
x =~ -8.01347
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b)  (49/81)^x+1  >  9/7
Do it like the 1st one.