Algebra Examples

$3^{x} = 4$

Step 1

Take the natural logarithm of both sides of the equation to remove the variable from the exponent.

$\ln (3^{x}) = \ln (4)$

Step 2

Expand $\ln (3^{x})$ by moving $x$ outside the logarithm.

$x \ln (3) = \ln (4)$

Step 3

Divide each term in $x \ln (3) = \ln (4)$ by $\ln (3)$ and simplify.

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Step 3.1

Divide each term in $x \ln (3) = \ln (4)$ by $\ln (3)$ .

$\frac{x \ln (3)}{\ln (3)} = \frac{\ln (4)}{\ln (3)}$

Step 3.2

Simplify the left side.

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Step 3.2.1

Cancel the common factor of $\ln (3)$ .

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Step 3.2.1.1

Cancel the common factor.

$\frac{x \ln (3)}{\ln (3)} = \frac{\ln (4)}{\ln (3)}$

Step 3.2.1.2

Divide $x$ by $1$ .

$x = \frac{\ln (4)}{\ln (3)}$

Step 4

The result can be shown in multiple forms.

Exact Form:

$x = \frac{\ln (4)}{\ln (3)}$

Decimal Form:

$x = 1.26185950 \dots$

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