Question

Решитее 7^5x -7^5x-1=6

Answer 1

$7^{5x}-7^{5x-1}=6$

 

$7^{5x}-frac{7^{5x}}{7}=6$

 

$7^{5x}(1-frac{1}{7})=6$

 

$7^{5x}* frac{6}{7}=7$

 

$7^{5x}=6:frac{6}{7}$

 

$7^{5x}=7$

 

$5x=1$

 

$x=frac{1}{5}=0.2$

 

Ответ: 0.2