1. Solving 2-step equations ax + b = c

2. Keep it balanced Just like when solving a one- step equation keep it balanced. Just like when solving a one- step equation keep it balanced. Save the co-efficient until last. Save the co-efficient until last.

3. So what do we do first? In the equation In the equation 2x + 4 = 12 2x + 4 = 12 Our first step will be to subtract the 4 from each side of the equation. Our first step will be to subtract the 4 from each side of the equation.

4. Step 1: 2x + 4 = 12 2x + 4 = 12 -4 = -4 -4 = -4 2x = 8 2x = 8 Now we have a one-step equation.

5. Step 2: Divide by both sides by 2 2x = 8 2 2 2 2 x = 4 x = 4

6. Now you try one 2x + 5 = 15 Which operation should you do first? Subtract the 5 first Subtract the 5 first

7. 2x + 5 = 15 What should your second step be? Divide by 2

8. So what was your answer? 2x + 5 = 15 - 5 = -5 - 5 = -5 2x = 10 2x = 10 2 2 2 2 x = 5 x = 5

9. What if there is division in the equation? X - 6 = 25 4 What is your first step? Add the 6 to each side

10. What is your second step? X - 6 = 25 4 Multiply by 4

11. So what is your answer? X - 6 = 25 4 + 6 = + 6 + 6 = + 6 x = 31 x = 31 4

12. Now multiply by 4 4* X = 31 * 4 4* X = 31 * 4 4 x = 124 x = 124