4x : 4 = 64
4(x-4) = 43
x - 4 = 3
x = 3 + 4
=> x = 7
b, \(2^x.2^2=2^7\Rightarrow2^x=2^7:2^2\)
\(\Rightarrow2^x=2^5\Rightarrow x=5\)
c, \(x^{17}=x\Rightarrow x=1\)
d, \(x.x^2.x^3=64\Rightarrow x^{1+2+3}=2^6\Rightarrow x^6=2^6\Rightarrow x=2hoacx=-2\)