PHET Interactive Simulations: Equality Explorer Two Variables
System of Equations
Explore what it means for a mathematical statement to be balanced or unbalanced by interacting with integers and variables on a balance. Find multiple ways to balance x and y to build a system of equations.
Sample Learning Goals
Solve and manipulate algebraic equations by substituting different values for a variable
Use a balance model to solve an equation for an unknown, and justify your strategies for solving
Build a system of equations
Determine the solution set of a system of equations