1. Solving One and Two Step Equations

2. One Step Equations /
x + 7 = 4 /
x =-3

3. CHECK! x + 7 = 4 x = -3 (-3) + 7 = 4 4 = 4 One Step Equations  ?
Original Equation
x = -3
Answer ?
(-3) + 7 = 4
Substitute your answer in for x and see if its is true
4 = 4 

4. One Step Equations /
x - 8 = -6 /
x = 2

5. CHECK! x - 8 = -6 x = 2 2 - 8 = -6 -6 = -6 One Step Equations  ?
Original Equation
x = 2
Answer ?
2 - 8 = -6
Substitute your answer in for x and see if its is true
-6 = -6 

6. One Step Equations
3x = -12 / /
x = -4

7. CHECK! 3x = -12 x = - 4 3(-4) = -12 -12 = -12 One Step Equations  ?
Original Equation
x = - 4
Answer ?
3(-4) = -12
Substitute your answer in for x and see if its is true
-12 = -12 

8. One Step Equations
(5) x /
= -2
(5) 5 /
x = -10

9. CHECK! x = -2 5 x = -10 -10 = -2 -2 = -2 5 One Step Equations  ?
Original Equation
x = -10
Answer
-10 ?
Substitute your answer in for x and see if its is true
= -2
-2 = -2  5

10. / / / / 2 Step Equations 2x + 5 = 1 - 5 -5 2x = -4 2 2 x = -2
Do Order of Operations in Reverse (add and subtract first) /
2x + 5 = 1 /
2x = -4 / /
x = -2

11. CHECK! 2x + 5 = 1 x = -2 2(-2) + 5 = 1 1 = 1 -4 + 5 = 1
2 Step Equations
2x + 5 = 1
Original Equation
CHECK!
x = -2
Answer ?
2(-2) + 5 = 1
Substitute your answer in for x and see if its is true ?
1 = 1
= 1 

12. / / / / 2 Step Equations 3x - 2 = -5 +2 +2 3x = -3 3 3 x = -1
Do Order of Operations in Reverse (add and subtract first) /
3x - 2 = -5 / /
3x = -3 /
x = -1

13. CHECK! 3x - 2 = -5 x = -1 3(-1) - 2 = -5 -5 = -5 -3 - 2 = -5
2 Step Equations
3x - 2 = -5
Original Equation
CHECK!
x = -1
Answer ?
Substitute your answer in for x and see if its is true
3(-1) - 2 = -5 ?
-5 = -5
= -5 

14. / / / / 2 Step Equations -4x + 1 =-3 -1 -1 -4x = -4 -4 -4 x = 1
Do Order of Operations in Reverse (add and subtract first) /
-4x + 1 =-3 / /
-4x = -4 /
x = 1

15. CHECK! -4x + 1 = -3 x = 1 -4(1) + 1 = -3 -3 = -3 -4 + 1 = -3
2 Step Equations
-4x + 1 = -3
Original Equation
CHECK!
x = 1
Answer ?
Substitute your answer in for x and see if its is true
-4(1) + 1 = -3 ?
-3 = -3
= -3 

16. 2 Step Equations x
- 4 /
= -3 3 / x /
(3)
= 1
(3) / 3
x = 3

17. CHECK! 3 3 2 Step Equations x - 4 = -3 x = 3 3 - 4 = -3 -3 = -3
Original Equation
x = 3
Answer 3 ?
Substitute your answer in for x and see if its is true
- 4
= -3
-3 = -3  3
1 - 4 = -3

18. 2 Step Equations x
+ 2 /
= 0 4 / x
(4) /
= -2
(4) / 4
x = -8

19. CHECK! 4 4 2 Step Equations x + 2 = 0 x = -8 -8 +2 = 0 0 = 0
Original Equation
x = -8
Answer -8 ?
Substitute your answer in for x and see if its is true +2
= 0
0 = 0  4
= 0

20. / / / / / / 2 Step Equations 2 x +1 = 7 3 2 3 x 3 = 6 3 2 1 2 - 1 -1 / / / 2 3 x 3
= 6 / / 3 2 1 2
x = 9

21. CHECK! 2 3 3 2 Step Equations x + 1 = 7 x = 9 2 (9) +1 = 7 7 = 7
Original Equation
x = 9
Answer 2 ?
(9)
Substitute your answer in for x and see if its is true +1
= 7
7 = 7  3
6 + 1 = 7

22. / / / / / / 2 Step Equations 3 x -4 = -1 5 3 5 x 5 = 3 3 5 1 3 +4 +4 / / / 3 5 x 5
= 3 / 3 / 5 1 3
x = 5

23. CHECK! 3 5 5 2 Step Equations x - 4 = -1 x = 5 3 (5) -4 = -1 -1 = -1
Original Equation
x = 5
Answer 3 ?
(5)
Substitute your answer in for x and see if its is true -4
= -1
-1 = -1  5
3 - 4 = -1