Solve 3(1.3^x)=5

$$3 ( 1.3 ^ { x } ) = 5$$

Solve for x

$$x=\log_{1.3}\left(\frac{5}{3}\right)\approx 1.947009151$$

Steps Using Definition of Logarithm

Use the rules of exponents and logarithms to solve the equation.

$$3\times 1.3^{x}=5$$

Divide both sides by 3.

$$1.3^{x}=\frac{5}{3}$$

Take the logarithm of both sides of the equation.

$$\log(1.3^{x})=\log(\frac{5}{3})$$

The logarithm of a number raised to a power is the power times the logarithm of the number.

$$x\log(1.3)=\log(\frac{5}{3})$$

Divide both sides by \log(1.3).

$$x=\frac{\log(\frac{5}{3})}{\log(1.3)}$$

By the change-of-base formula \frac{\log(a)}{\log(b)}=\log_{b}\left(a\right).

$$x=\log_{1.3}\left(\frac{5}{3}\right)$$

Solve for x (complex solution)

$$x=\frac{i\times 2\pi n_{1}}{\ln(1.3)}+\log_{1.3}\left(\frac{5}{3}\right)$$

$$n_{1}\in \mathrm{Z}$$