64 . 4x = 168
<=> 43. 4x = 416
=> 3 + x = 16
<=> x = 13
Vậy x = 13
2x.162 = 1024
<=> 2x. 28 = 210
=> x + 8 = 10
<=> x = 2
Vậy x = 2
b: Ta có: \(2^x\cdot16^2=1024\)
\(\Leftrightarrow2^x\cdot2^8=2^{10}\)
\(\Leftrightarrow x+8=10\)
hay x=2
64.4x=163
26. (22)x = (24)3
=> 26. 22x = 212
22x = 2 12 : 26
22x = 26
=> 2x = 6
x = 6 :2
x=3
- Vậy x =3