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Lesson 3.3 Solving Multi-step Equations

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.

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Lesson 3.3 Solving Multi-step Equations

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

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

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

  4. 3x + 7 = -8 + -7 + -7 3x = -15 3x = -15 3 3 x = -5 • -  + • Draw the line • Circle the Variable • Simplify • Inverse Operation

  5. Practice Page 144 #1-3 *Show all work

  6. P. 144 #1 -  + Draw the line Circle the Variable Simplify Inverse Operation 6x – 15 = 9 6x + -15 = 9 + 15 + 15 6x = 24 6x = 24 6 6 x = 4

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

  8. P. 144 #3 y = -2

  9. Combining Like Terms First -  + Draw the line Circle the Variable Simplify Inverse Operation 7x – 3x – 8 = 24 7x + -3x + -8=24 (7x+ -3x) 4x + -8 = 24 4x + -8 = 24 + 8 + 8 4x32 4 4 x = 8

  10. Practice • P. 147 # 7- 12

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