Intro to systems of equations

3 videos
1 skill
Whether in the real world or a cliche fantasy one, systems of equations are key to solving super-important issues like "the make-up of change in a troll's pocket". This tutorial shows you how to solve systems of equations graphically.

Systems of equations: trolls, tolls (1 of 2)

VIDEO 6:51 minutes
A troll forces us to use algebra to figure out the make-up of his currency. We end up setting up a system of equations.

Systems of equations: trolls, tolls (2 of 2)

VIDEO 5:41 minutes
Solving the system of equations visually. Now we can save the prince/princess.

Testing a solution to a system of equations

VIDEO 2:38 minutes
Sal checks whether (-1,7) is a solution of the system: x+2y=13 and 3x-y=-11.

Test solutions to systems of equations

PRACTICE PROBLEMS
Verify whether a given pair of values is a solution to a system of equations.