1. Algebra Review “Solving Equations”
September 20th 2010

2. Balancing the Equation…
Inverse Operations…
To solve algebraic equations, we use inverse operations. To get the variable by itself, we do the opposite.
Ex: subtraction gets rid of addition
multiplication gets rid of division
Balancing the Equation…
Whatever you do to one side, you must do to the other

3. One-Step Equations
3x = x – 5 = 2
x/2 = x = 4

4. Two-Step Equations
2x – 1 = – 3x = 20

5. Multi-Step Equations
4( x – 1 ) = ( 3x + 2 ) + 5 = 21

6. Equations w/ Variable on Both Sides
3x – 6 = 5x x + 10 = x - 2

7. Solving Ratios

8. CLASSWORK 1) 7x = 35 8) 3( x – 2) = 3 2) x – 7 = 11 9) 12x -1 = 143
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9. CLASSWORK Answers 1) x = 5 8) x =3 2) x = 18 9) x = 12