50 e ^ { 0,035 x } = 200
Solve for x
x=\frac{400\ln(2)}{7}\approx 39.608410318
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50e^{0,035x}=200
Use the rules of exponents and logarithms to solve the equation.
e^{0,035x}=4
Divide both sides by 50.
\log(e^{0,035x})=\log(4)
Take the logarithm of both sides of the equation.
0,035x\log(e)=\log(4)
The logarithm of a number raised to a power is the power times the logarithm of the number.
0,035x=\frac{\log(4)}{\log(e)}
Divide both sides by \log(e).
0,035x=\log_{e}\left(4\right)
By the change-of-base formula log(a)/log(b)=log(b,a).
x=\frac{2\ln(2)}{0,035}
Divide both sides of the equation by 0,035, which is the same as multiplying both sides by the reciprocal of the fraction.
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