Solving Word Problems with Equations: Finding the Cost Equilibrium

The video tutorial teaches how to solve word problems by using equations with one variable. It begins with an example of choosing a cell phone plan and progresses to solving equations by isolating variables. The tutorial then presents a field trip cost problem, demonstrating how to set up and solve equations to find when two bus companies' costs are equal. The lesson concludes with a reminder to check solutions and avoid common mistakes.

Explain the steps taken to solve for the number of students needed for the two bus companies to cost the same.

What common mistake should be avoided when solving word problems involving equations?