Question

3^x+4+3*5^x+3=5^x+4+3^x+3

Answer 1

$3^{x+4}+3*5^{x+3}=5^{x+4}+3^{x+3} \ 81*3^x+375*5^x=625*5^x+27*3^x\ 54*3^x=250*5^x\ (frac{3}{5})^x=frac{125}{27}\ x=-3$