Addition Property of Equality Test #5

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In this section, we learn how to solve a linear equation in one variable using the Addition Property of Equality. We begin with an equation of the
form: x + a = c. To solve this type of equation, we must first learn about two new properties. The first is known as the addition property of equality.
This property tells us that we can add the same number to both sides of an equation and not change the solution. The second is known as the additive inverse
property. This property tells us that a number and its opposite will always sum to zero. Using these two properties together allows us to solve simple equations
such as: x + 3 = 7. We can add negative three to both sides and isolate x: -> x + 3 + (-3) = 7 + (-3) -> x = 4. We see that x in this case is equal to four.
We can check by asking does four plus three equal seven? The answer is yes and so the solution x = 4 is correct.

Addition Property of Equality Resources:

Videos:

Khan Academy - Video
Virtual Nerd - Video
Learn Zillion - Video
Text Lessons:

WTAMU - Text Lesson
Math Planet - Text Lesson
Purple Math - Text Lesson
Worksheets:

Helping with Math - Worksheet
Super Teacher - Worksheet
Khan Academy - Practice
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