a) 3x * 3 = 243
=> 3x = 81
=> x = 27
b) x20 = x
=> x = 0 ; 1
c) 2x * 162 = 1024
=> 2x * 256 = 1024
=> 2x = 4
=> x = 2
d) 64 * 4x = 168
=> 64 * 4x = 4294967296
=> 4x = 67108864
=> x = 13
g) 2x - 15 = 17
=> 2x = 32
=> x = 5
i) 3x + 25 = 26 * 22 + 2 * 30
=> 3x + 25 = 26 * 4 + 2 * 1
=> 3x + 25 = 104 + 2
=> 3x + 25 = 106
=> 3x = 81
=> x = 4
l)49 * 7x = 2041
=> 7x ~ 41,653
=> x ~ 1,9165
m) 64 * 4x = 45
=> 64 * 4x = 1024
=> 4x = 16
=> 2
n) 3x = 243
=> x = 5
p) 34 * 3n = 37
=> 3n = 33
=> n = 3