Dr. Fraser moves further into systems of equations by Solving with Addition and Subtraction. After covering the fundamental principle which allows this technique to work, you will cover four comprehensive examples to make sure you understand the new concepts.
If no coefficient
is 1 or 1, use the addition and subtraction method. If
you can add or subtract the equations and get one variable to
vanish, then just solve for the remaining variable. This called
Use this method if
the coefficients of one of the variables have the same or opposite
signs in the two equations.
Solving by Addition and Subtraction
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.