8.2 Solving Two Step Equations. 2 more Properties of Equality Addition Property of Equality If a=b Then a+c =b+c Subtraction Property of Eqaulity If a=b.

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Presentation transcript:

8.2 Solving Two Step Equations

2 more Properties of Equality Addition Property of Equality If a=b Then a+c =b+c Subtraction Property of Eqaulity If a=b Then a – c = b – c

Steps to Solve Multistep Equation 1.Simplify both sides of the equal sign (collect like terms if there are any) 2.) Use the Addition or Subtraction Property of Equality 3.) Use Multiplication of Division Property of Equality

Example 1: Solve 3x + 4 = x = 9 x = 3 3 3

Example 2: Solve x + 6 = x = 15 x = 75

Ex 3: 6x + 2x = 16 If there are like terms on one side of the equation, collect them before using the properties 8x = 16 x = 2

Ex 4: 9x - 4x = 20 5x =

Ex 5: 9x + 3x – 5 = 19 12x = 24 12x – 5 = x = 2

Assignment: Page 336 (28-62) even