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Solve for x (complex solution)
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\frac{40\times 8}{32^{-2}}=2^{x+13}
Multiply 4 and 10 to get 40.
\frac{320}{32^{-2}}=2^{x+13}
Multiply 40 and 8 to get 320.
\frac{320}{\frac{1}{1024}}=2^{x+13}
Calculate 32 to the power of -2 and get \frac{1}{1024}.
320\times 1024=2^{x+13}
Divide 320 by \frac{1}{1024} by multiplying 320 by the reciprocal of \frac{1}{1024}.
327680=2^{x+13}
Multiply 320 and 1024 to get 327680.
2^{x+13}=327680
Swap sides so that all variable terms are on the left hand side.
\log(2^{x+13})=\log(327680)
Take the logarithm of both sides of the equation.
\left(x+13\right)\log(2)=\log(327680)
The logarithm of a number raised to a power is the power times the logarithm of the number.
x+13=\frac{\log(327680)}{\log(2)}
Divide both sides by \log(2).
x+13=\log_{2}\left(327680\right)
By the change-of-base formula \frac{\log(a)}{\log(b)}=\log_{b}\left(a\right).
x=\log_{2}\left(327680\right)-13
Subtract 13 from both sides of the equation.