Question

4 elevado a x+5 = 1/16 elevado a 2x +3

Answer 1

$4^{x+5}=(\frac{1}{16} )^{2x+3}\\ \\ 4^{x+5}=(\frac{1}{4^2} )^{2x+3}\\ \\ 4^{x+5}=(4^{-2})^{2x+3}\\ \\ 4^{x+5}=4^{-4x-6}\\ \\ x+5=-4x-6\\ \\ x+4x=-6-5\\ \\ 5x=-11\\ \\ x=-\frac{11}{5}$