An algebraic equation contains one or more letters in it. Each letter in the equation is called a variable. A variable can change in value. We guess at different values for each letter until our ...

Excel is incredibly powerful when your data is complete, but what happens when you need to solve for unknown variables? Enter Goal Seek and the Solver add-in, two tools that let Excel do the heavy ...

We solve an equation by working out the value for one letter. To solve an equation we use the inverse operations to undo the equation. This video shows a visual method for solving a word problem. The ...