A) [tex]3^{x}[/tex]=243 = x=5
B) [tex]2^{x}[/tex]=256 = x=8
C) [tex]1000^{x}[/tex]=1 = x=0
D) [tex]10^{x} = 1000[/tex] = x=3
E) [tex]5^{7x-4}=125[/tex] = x=1
F) [tex]2^{2x-1}=2^{4x+8}[/tex] = x= [tex]-\frac{9}{2}[/tex]
G) [tex]2^{x-1}=4^{2x+4}[/tex] = x=-3
H) [tex](2^{x})^3 = 8^{6-2x}[/tex] = x=2
I) [tex]5^{x-1} = \frac{1}{625}[/tex] = x=-3
J) [tex](3^{x})^8=\frac{1}{81}[/tex] = x=[tex]-\frac{1}{81}[/tex]
K) [tex]2^{x} + 2^{x+3}=18[/tex] = x=1
L) [tex]3^{x+5} -3^x^+^3=216[/tex] = x=0
M) [tex]2^{\frac{48}{x} } =8[/tex] = x=16
N) [tex](\frac{1}{2})^x=32[/tex] = x=-5
O) [tex]2^{x-3}+2^{x-1}+2^{x} =52[/tex] = x=5
Espero que esteja certo ^^