Question

RESOLVA EQUAÇOES EXPONENCIAIS COM INCÓGNITA X : ( ANEX0 )

Answer 1

$2^x+2^{x-1}=12\\2^x+2^x.2^-1=12\\\\y=2^x\\\\y+y.2^{-1}=12\\y+\frac{y}{2}=12~*2\\2y+y=24\\3y=24\\\\y=\frac{24}{3}\\\\y=8\\\\2^x=8\\2^2=2^3\\\\x=3\\\\2^3+2^{3-1}=12\\8+4=12\\12=12$