1. Using the Properties Together
Chapter 3-3
Using the Properties Together

2. The 4 Rules for Solving Equations

3. Subtract 4 from both sides first.
Solve.
3x + 4 = 13
Subtract 4 from both sides first.
3x = 9 3 3
x = 3

4. Subtract 6 from both sides first.
Solve.
-5x + 6 = 16
Subtract 6 from both sides first.
-5x = 10 -5 -5
x = -2

5. Solve.
9x - 6 = 39
Add 6 to both sides first.
9x = 45 9 9
x = 5

6. Collecting Like Terms in Equations
4 - 2x + 8 = 16
Combine like terms first:
-2x + 12 = 16
-2x = 4
x = -2

7. Solve. 2(2y + 3) = 14
4y + 6 = y = y = 2

8. Solve. 4(3x - 2) + 12x = 40
12x x = 40 24x – 8 = x = x = 2

9. Homework
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