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a = (log 12)/(log 24)
 
b = (log 36)/(log 48)
 
c = (log 24)/(log 36)
 
1 + abc = 2bc
 
1 +(log 12)(log 24)(log 36)/(log 24)(log 36)(log 48) = 2(log 24)(log 36)/(log 36)(log 48)
 
Cancel out between the numerator & denominator on both sides
 
1 + (log 12)/(log 48) = 2(log 24)/(log 48)
 
(log 48)/(log 48) + (log 12)/(log 48) = 2(log 24)/(log 48)
 
(log 48 + log 12)/(log 48) = (log 24^2)/(log 48)
 
(log (48*12))/(log 48) = (log 576)/(log 48
 
(log 576)/(log 48) = (log 576)/(log 48)
 
They are equal