Question

equação exponencial

2x + 2x+¹ = 3

Answer 1

$2^x+2^{x+1}=3 \\ \\ 2^x+2.2^x=3 \\ \\ \boxed{2^x=y} \\ \\ y+2y=3 \\ \\3y=3 \\ \\ y=1 \\ \\ \boxed{2^x=1 \rightarrow x=0}$