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INSTRUCTORS Carleen Eaton Grant Fraser Eric Smith
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For more information, please see full course syllabus of Algebra 1
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Addition and Subtraction Techniques

  • Solving an equation means finding all values of the variable that make the equation true.

  • To solve an equation, isolate the variable on one side of the equation and with a coefficient of 1.

  • You can do this by using the addition and subtraction properties of equality: If you add or subtract the same quantity to both sides of an equation, the resulting equation has the same solutions as the original equation.

Addition and Subtraction Techniques

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.

  • Intro 0:00
  • Techniques 0:22
    • Adding the Same Number
    • Example
    • Subtracting the Same Number
    • Example
  • Strategy 2:36
    • Isolate the Variable
  • Lecture Example 1 3:48
  • Lecture Example 2 5:41
  • Additional Example 3
  • Additional Example 4