Equations cannot always be solved in one step. sometimes you must perform several operations before you can solve for the variable. you must try to isolate the variable on one side of the equation (usually the left).

example:

2x + 4 = 12 first, subtract 4 from each side
2x = 8
then divide each side by 2
x = 4
the solution (answer) is 4

example:

1/3s - 6 = 18
first, add 6 to each side
1/3s = 24
then, multiply each side by 3 (inverse of 1/3)
s = 72
the solution (answer) is 72

visit the following websites for more information, examples and practice on this concept.

lesson review

directions: solve each of the following equations.

1. 2x - 12 = 6

2. 2x + 6= 8

3. 12s - 12=12

4. 14s + 6 = 35

5. 3s - 12 = 6

6. 18t + 9 = 34

7. 21x + 7 = 28

8. 50y + 5 = 105

9. 1/4x - 6 = 24

10. 13x + 2 = 18

11. 6 - 3x = 18

12. 14 + s = 21

13. 16x - 4 = 28

14. 19x - 1 + 3 = 40

15. 10t = 194

16. 400x + 100 = 1100

17. 40 - 3x + 3 = 113

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