16.4x = 48
42.4x = 48
42+x = 48
2 + x = 8
x = 8 - 2
x = 6
vậy x = 6
16 . 4x = 48
42 . 4x = 48
4x = 48 : 42
4x = 46
=> x = 6
\(16.4^x=4^8\)
\(\Leftrightarrow4^2.4^x=4^8\)
\(\Rightarrow4^x=4^8:4^2\)
\(\Rightarrow4^x=4^6\)
\(\Rightarrow x=6\)
Vậy x=6
16 x \(4^x\) = \(4^8\)
\(4^x\)= \(4^8\): 16
\(4^x\)= \(4^6\)
\(\Rightarrow\)x = 6