1. Add Subtract Multiply Divide
One step equations
Add
Subtract
Multiply
Divide

2. Addition X + 5 = -9 X + 5 - 5 = -9 -5 X = -14 -6 + X = -4
You must subtract the same number from what you want to be moved. The idea is keep the variable alone by doing the opposite.

3. Try the following on your paper.
10 = X + 3
5 + X = 9
6 = 3 + X

4. Answers!!!
X = 7
X = 4
X = 3

5. Equations with subtraction
X - 5 = 8
X = 8+5
X = 13
5 - X = 6
X = 6 - 5
X = 1
Add the opposite sign of the number you want to move.

6. Try the following on your paper.
X - 7 = -1
X - 4 = 66
8 = X - 2
-8 = X - 2

7. Answers!!!
X = 6
X = 70
X = 10
X = -6

8. Multiplication of Equations
3X = -9
3X/3 = -9/3
X = -3
-5X = -40
-5X/-5 = -40/-5
X = 8
When solving multiplication equations, you divide both sides by the number attached to the variable. Be sure to use the same sign.

9. Try these on your paper.
4X = -16
-1X = 9
6 = 5X
12X = 3

10. Answers!!!
X = -4
X = -9
X = 6/5
X = 1/4

11. Division of Equations 1/2X = 4 (2/1)1/2X = 4(2) X = 8 -3/4X = 6
Multiply both sides by the reciprocal. You must keep the sign of the fraction with the variable.

12. Try these on your paper.
X/3 = 9
-X/4 = 7
1/3X = -1
4 = X/4

13. Answers!!!
X = 27
X = -28
X = -3
X = 16

14. Write the following on your paper for a quiz grade.
_4X = 15
X/2 = -8
9 - X = -1
-12 + X = 0
-X/3 = 4
X + 5 = 5
X - 4 = 4
-X = 5
X =-50
X/5 = -55