Section 3.4 Solving Equations with Variables on Both Sides Mr. Beltz & Mr. Sparks.

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Presentation transcript:

Section 3.4 Solving Equations with Variables on Both Sides Mr. Beltz & Mr. Sparks

Goal:  Solve equations that have variables on both sides.

Basics Get the Variables to one side (either side) Combine Like Terms Solve the Equation using Inverse Relationships Remember: You always want to solve for the Variable, “X = ?”

7x + 19 = -2x x +2x 9x + 19 = x = x = 4 Do the Inverse Relationship to get the Variables on the LEFT SIDE Simply the Equation Do the Inverse of Addition [subtraction] Do the Inverse of Multiplication [Division]

80 – 9y = 6y +9y +9y 80 = 15y = y 3 Do the Inverse Relationship to get the Variables on the LEFT SIDE Simply the Equation Do the Inverse of Multiplication [Division]

3x – x = 5x – 7 3x + –10 + 4x = 5x + –7 7x = 5x x -5x 2x = x = X= 3/2 Change – to + Opposite of the next number Combine Like Terms Do the Inverse Relationship to get the Variables on the LEFT SIDE Simply the Equation Do the Inverse of Subtraction [Addition] Simply the Equation Do the Inverse of Multiplication [Division]

Independent Practice P. 152 #1-4

Independent Practice Answers #1. x = 2 #2. y = 3 #3. x = -2 #4. x = -4

HW Assignment P. 154 # 3-8 [all] & [ODD]

Friday’s HW P. 154 # 1, 2, [EVEN], 36, 50