6^(5x+2)=36^(3x-4)
=>6^(5x+2)=(6^2)^(3x-4)
=>6^(5x+2)=6^6x-8
=>5x+2=6x-8
=>5x-6x=-8-2
=>-x=-10=>x=10
\(6^{5x}+2=36^{3x}-4\Leftrightarrow6^{5x}+2=6^{6x}-4\Leftrightarrow6^{5x}\left(6-1\right)=6\Leftrightarrow6^{5x}=\frac{6}{5}\)
OMG! May be I don't know the correct answer.