Thursday, May 14, 2015

7 raised to 5x-8 and 5 raised to x+2 if product of these two is equal to 30625 then how to find value of x


%0D%0A7%5E%285x-8%29%2A5%5E%28x%2B2%29=30625%0D%0A
%0D%0A7%5E%285x-8%29%2A5%5E%28x%2B2%29=5%5E4%2A7%5E2%0D%0A

%0D%0A%287%5E%285x-8%29%2F7%5E2%29%2A%285%5E%28x%2B2%29%2F5%5E4%29=1%0D%0A

%0D%0A%287%5E%285x-8-2%29%29%2A%285%5E%28x%2B2%2B4%29%29=1%0D%0A
%0D%0A%287%5E%285x-10%29%29%2A%285%5E%28x%2B6%29%29=1%0D%0A
%0D%0Alog%28%287%5E%285x-10%29%29%2A%285%5E%28x%2B6%29%29%29=log%281%29%0D%0A
%0D%0A%285x-10%29log7%2B%28x%2B6%29log5=0%0D%0A

%0D%0A%285log7%2Blog5%29x=10log7-6log5%0D%0A

%0D%0Ax=%2810log7-6log5%29%2F%285log7%2Blog5%29%0D%0A

:)
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