A one-step equation is a mathematical equation that only requires one operation (such as addition, subtraction, multiplication, or division) to solve. One-step equations that involve multiplying or dividing are equations where one side of the equation has a coefficient that is a fraction or a decimal.

For example, 2x = 8 is a one-step equation that can be solved by dividing both sides by 2. x = 4 is the solution. When solving one-step equations that involve multiplying or dividing, it is important to remember to perform the same operation on both sides of the equation. This will ensure that the equation remains balanced and that the solution is correct.