How do you use properties of equality to solve equations?

1. How do you use properties of equality to solve equations? X + 7 = 22

2. In this lesson you will learn to solve equations…by using additive inverses

3. Properties of numbers 4 = 4 4 + 2= 4+ 2 4 -3= 4-3

4. When we use the term solution, we mean a value that makes the equation true x-1=0 1 is our solution

5. Additive Inverse 1 + -1 = 0

6. Thinking additive inverses must be negative

7. x+5 = 10 + - 5 is the same as - 5 x+5 -5= 10-5 X = 5

8. Here we’re looking at -2 as “a” X – 2 = 7 x – 2 + 2= 7+ 2 x = 9

9. In this lesson you have learned how to solve an equation…by using additive inverses.

10. Solve the following equations for x; show your work x + 3 =13 x – 6 = 20

11. Why do we use substitution to check our answers when we solve an equation? Provide an example.

12. Define “additive inverse” in your own words. How would you use additive inverses to solve x + 4 = -5 ?

13. Solve for x, show your work x – 7 = 8 Solve for x, show your work x + 2 = 19