Critical Thinking Skill: Demonstrate Understanding of Concepts

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Presentation transcript:

Critical Thinking Skill: Demonstrate Understanding of Concepts Two Step Equations Critical Thinking Skill: Demonstrate Understanding of Concepts

Two Step Equations Review: 1). x - 6 = 15 2). 3x = 21

All in one problem... ex 1: 3x - 6 = 15 ex 2: 12x - 14 = 10 “Undo” addition and subtraction first “Undo” multiplication and division next the opposite of order of operation ex 1: 3x - 6 = 15 ex 2: 12x - 14 = 10

3.) 3x + 7 = 16   4.) 5.) -y + 14 = -8 6.) r + 7 = -4 3

Word Problem: A rental car company charges a base fee of $25 plus $0.40  per mile driven. How much would it cost to rent a car and drive 20 miles?

Word Problem: Steps: 1.) Describe what the variable represents in words (find the unknown) 2.) Write and solve the equation. 3.) Write your answer in a sentence A rental car company charges a base fee of $40.50 plus $0.50 per mile driven. How many miles did you drive if the total bill is $50.50?

Demonstrate Understanding 2.) 1.) 2q -72 = -8 4.) 6 2m =8 3.) 3n + 8 = 2 5.) -9d + 4= -5

6.) Erica went shopping for new clothes for school. She bought a pair Word Problem: Steps: 1.) Describe what the variable represents in words (find the unknown) 2.) Write and solve the equation. 3.) Write your answer in a sentence 6.) Erica went shopping for new clothes for school. She bought a pair of jeans for $35 and several shirts for $12 each. How many shirts did Erica buy if the total bill was $83?