Question

решить уравнение 8^9-x=64^x

Answer 1

8^(9-x)=64^x

2^(3(9-x)) = 2^6x

 2^(27-3x) = 2^6x 

2^27 / 2^3x =2^6x

2^27 = 2^6x * 2^3x

2^27 = 2^9x

27=9x

x=3