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Solve for x
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Solve for x (complex solution)
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5^{x}=7
Use the rules of exponents and logarithms to solve the equation.
\log(5^{x})=\log(7)
Take the logarithm of both sides of the equation.
x\log(5)=\log(7)
The logarithm of a number raised to a power is the power times the logarithm of the number.
x=\frac{\log(7)}{\log(5)}
Divide both sides by \log(5).
x=\log_{5}\left(7\right)
By the change-of-base formula \frac{\log(a)}{\log(b)}=\log_{b}\left(a\right).