\(3\cdot5^x-8=367\Leftrightarrow3\cdot5^x=367+8\)
\(\Leftrightarrow3\cdot5^x=375\)
\(\Leftrightarrow5^x=375:3=125\)
\(\Leftrightarrow5^x=5^3\Rightarrow x=3\)
Vậy x=3
3 . 5\(^x\)- 8 = 367
3 . 5\(^x\) = 367 + 8
3 . 5\(^x\) = 375
5\(^x\) = 375 : 3
5\(^x\) = 125
5\(^x\) = 5\(^3\)
x = 3
3×5^x-8=367
3×5^x=367+8
3×5^x=375
5^x=375÷3
5^x=125
5^x=5^3 . Vậy x=3