1)
[tex]2^x=64\ \therefore\ 2^x=2^6\ \therefore\ \boxed{x=6}[/tex]
2)
[tex]2^x=128\ \therefore\ 2^x=2^7\ \therefore\ \boxed{x=7}[/tex]
3)
[tex]3^x=243\ \therefore\ 3^x=3^5\ \therefore\ \boxed{x=5}[/tex]
4)
[tex]9^x=27\ \therefore\ 3^{2x}=3^3\ \therefore\ 2x=3\ \therefore\ \boxed{x=\dfrac{3}{2}}[/tex]
5)
[tex]25^x=125\ \therefore\ 5^{2x}=5^3\ \therefore\ 2x=3\ \therefore\ \boxed{x=\dfrac{3}{2}}[/tex]
