Common Algebra Mistakes
Example: Solving an Exponential Equation

The Goal

Solve the following equation for t:


The Mistake

Find the algebra mistake:


(Roll the mouse over the algebra to see a hint in red)

The Correction


(Roll the mouse over the area above to see the correction in blue)

An Explanation

The rules of logarithms were incorrectly used. The log of a product is the sum of the logs of the factors.

For this equation a more efficient solution would be to start by dividing both sides by 10:


Home Page | Common Algebra Mistakes | Privacy Policy