3x-3 - 32 = 2 . 32
3x-3 - 9 = 2 . 9
3x-3 - 9 = 18
3x-3 = 18 + 9
3x-3 = 27
3x-3 = 33
x - 3 = 3
x = 3 + 3
x = 6
Vậy x = 6
\(3^{x-3}-3^2=2.3^2\)
\(3^{x-3}-9=2.9\)
\(3^{x-3}-9=18\)
\(3^{x-3}=18+9\)
\(3^{x-3}=27\)
\(3^{x-3}=3^3\)
\(x-3=3\)
\(x=3+3\)
\(x=6\)
\(3^{x-3}-3^2=2\cdot3^2\)
\(3^x\div3^3-9=2\cdot9\)
\(3^x\div3^3-9=18\)
\(3^x\div3^3=18+9\)
\(3^x\div3^3=27\)
\(3^x\div3^3=3^3\)
\(3^x=3^3\cdot3^3\)
\(3^x=3^6\)
\(\Rightarrow x=6\)
Vậy \(x=6\)