Solve: $2^{3x}-3^x-2^{3x-1}3^{x+1}=-288$

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$$2^{3x}-3^x-2^{3x-1}3^{x+1}=-288$$ I have a problem doing exponential functions. I find it really hard. I really tried doing this and I cant find anyway to getting close to a result.I factored it every way possible and still cant see anything. Can somebody give some hint and give some tips how to solve these kind of problems easier?