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×^log(5x-3) + ×^log4= 2
×^log(5x-3).4 = ×^logx^2
(5x-3).4 = x^2
x^2 - 20x + 12= 0
x = 5-3(log^4/x^2) . log ^2
x = 2 log x/ 6x^2
= 2 log 12 x