chapter 2 2.4: equations with variables on both sides

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Chapter 2 2.4: Equations with Variables on Both Sides

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Word Problem  You are trying to decide if you should buy used skates or rent skates. How many hours do you need to skate for the cost to be the same? Skate Rentals In-line skates $3.50/hr & safety equipment Safety Equipment$1.50/hr

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Page 1: Chapter 2 2.4: Equations with Variables on Both Sides

Chapter 2

2.4: Equations with Variables on Both Sides

Page 2: Chapter 2 2.4: Equations with Variables on Both Sides

Examples 6x + 3 = 8x – 21

-6d = d + 4

2(c – 6) = 9c + 2

Page 3: Chapter 2 2.4: Equations with Variables on Both Sides

Word Problem You are trying to decide if you should buy used

skates or rent skates. How many hours do you need to skate for the cost to be the same?

Skate RentalsIn-line skates $3.50/hr& safety equipment

Safety Equipment$1.50/hr

Page 4: Chapter 2 2.4: Equations with Variables on Both Sides

Word Problem A hairdresser is ordering shampoo. Company

A charges $4 / 8oz bottle and $10 for shipping and handling. Company B charges $3 / 8oz bottle and $25 for shipping and handling. How many bottles must the hairdresser buy to justify using Company B?

Page 5: Chapter 2 2.4: Equations with Variables on Both Sides

Definitions An equation has no solution if no value make

the equation true and is an identity if there are an infinite number of solutions. 10 – 8a = 2(5 – 4a)

6m – 5 = 7m + 7 – m

Page 6: Chapter 2 2.4: Equations with Variables on Both Sides

Assignment p. 98 – 99

2-26 evens