Common Algebra Mistakes
Example: Solving a Linear Equation

The Goal

Solve the following equation for k:


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 mistake was that 3k was subtracted from the left side but added to the right side. Instead, 3k should have been added to both sides.

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