Lesson 3.3 Solving Multi-step Equations Mr. Beltz & Mr. Sparks.

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Presentation transcript:

Lesson 3.3 Solving Multi-step Equations Mr. Beltz & Mr. Sparks

GOAL: Use two or more steps to solve a linear equation. Key Words: –Like Terms –Distributive Property

***Change Subtraction to Addition, take the Opposite of the next number.*** 1 st Draw a line underneath the equal sign. 2 nd Circle the variable (remember the sign to the left stays with the variable) 3 rd Simplify one or both sides. 4 th Do the Inverse Operation 1 st Addition & Subtraction 2 nd Multiplication & Division

-  + Draw the line Circle the Variable Simplify Inverse Operation 3x + 7 = x = x = -5

Practice Page 144 #1-3 *Show all work

P. 144 #1 6x – 15 = 9 6x = x = x = 4 -  + Draw the line Circle the Variable Simplify Inverse Operation

P. 144 # 2 7x – 4 = -11 7x + -4= x = -7 7 x = -1 -  + Draw the line Circle the Variable Simplify Inverse Operation

P. 144 #3 y = -2

Combining Like Terms First 7x – 3x – 8 = 24 7x + -3x + -8=24 (7x+ -3x) 4x + -8 = x x = 8 -  + Draw the line Circle the Variable Simplify Inverse Operation

Practice P. 147 # 7- 12