2.1 Solving Problems by Creating an Equation

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Presentation transcript:

2.1 Solving Problems by Creating an Equation

Solving a Problem by Creating an Equation Toucans and blue-and-yellow macaws are both tropical birds. The length of an average toucan is about two thirds of the length of an average blue-and-yellow macaw. Toucans are about 24 in. long. What is the length of an average blue-and-yellow macaw?

Solving a Problem by Creating an Equation Toucans and blue-and-yellow macaws are both tropical birds. The length of an average toucan is about two thirds of the length of an average blue-and-yellow macaw. Toucans are about 24 in. long. What is the length of an average blue-and-yellow macaw? x = I don’t know the length of a macaw I do know toucans are 24 in long I do know toucans are 2/3 as long as macaws

Solving a Problem by Creating an Equation Toucans and blue-and-yellow macaws are both tropical birds. The length of an average toucan is about two thirds of the length of an average blue-and-yellow macaw. Toucans are about 24 in. long. What is the length of an average blue-and-yellow macaw? x = I don’t know the length of a macaw I do know toucans are 24 in long I do know toucans are 2/3 as long as macaws X = 2 3 x

Solving a Problem by Creating an Equation An online DVD rental company offers gift certificates that you can use to purchase rental plans. You have a gift certificate for $30. The plan you select costs $5 per month. How many months can you purchase with the gift certificate?

Solving a Problem by Creating an Equation An online DVD rental company offers gift certificates that you can use to purchase rental plans. You have a gift certificate for $30. The plan you select costs $5 per month. How many months can you purchase with the gift certificate? x = I don’t know how many months I can buy with the certificate I do know I have $30 I do know each month costs $5

Solving a Problem by Creating an Equation An online DVD rental company offers gift certificates that you can use to purchase rental plans. You have a gift certificate for $30. The plan you select costs $5 per month. How many months can you purchase with the gift certificate? x = I don’t know how many months I can buy with the certificate I do know I have $30 I do know each month costs $5 30 = 5x

Solving a Problem by Creating an Equation You have already read 117 pages of a book. You are one third of the way through the book. Write and solve an equation to find the number of pages in the book.

Solving a Problem by Creating an Equation You have already read 117 pages of a book. You are one third of the way through the book. Write and solve an equation to find the number of pages in the book. x = I don’t know how many pages are in the whole book I do know I have already read 117 pages I do know I am finished with 1/3 of the book

Solving a Problem by Creating an Equation You have already read 117 pages of a book. You are one third of the way through the book. Write and solve an equation to find the number of pages in the book. x = I don’t know how many pages are in the whole book I do know I have already read 117 pages I do know I am finished with 1/3 of the book 117 = 1 3 x