Precalculus Examples

$\ln (2 x) = \ln (x + 3)$

Step 1

For the equation to be equal, the argument of the logarithms on both sides of the equation must be equal.

$2 x = x + 3$

Step 2

Move all terms containing $x$ to the left side of the equation.

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Step 2.1

Subtract $x$ from both sides of the equation.

$2 x - x = 3$

Step 2.2

Subtract $x$ from $2 x$ .

$x = 3$