Question

$4 ^frac{x+3}{x} +4 ^ frac{2x+3}{x} =320$

Answer 1

$frac{4x+12+8x+12-320x}{x}$=0
4x+12+8x+12-320x=0
-308x=-24
x=$frac{24}{308}= frac{12}{154}= frac{6}{77}$
Ответ:$frac{6}{77}$