## With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

No credit card required

### Conclusion

In this chapter, you have investigated how to solve equations that contain two variables. A central approach in this respect involves substitution. Accordingly, you solve an equation for one of its values, and then substitute the solution back into the equation to solve for the remaining value. Working with substitution provided a starting point for examining systems of equations. Systems of equations can involve any number of different variables. They can also involve any number of equations.

In this chapter, you started out by examining how to work with systems of two equations. You then moved to three. You first used multiplication and addition to approach equations as sets of variables with coefficients. From this you proceeded ...

## With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

No credit card required