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Solve.

COOKIES At the bakery there are boxes of cookies for sale. Two boxes contain 12 sugar cookies. If the bakery wants to sell 20 boxes on Saturday, how many cookies will they have to bake?

Understand Read the problem. Write what you know.

There are 2 boxes with 12 cookies. You need to find out how many cookies need to be baked to fill 20 boxes.

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Plan Pick a strategy. One strategy is to write an equation. Let x represent the number of cookies that need to be baked to fill 20 boxes. Set up the proportion.

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Solve

Cross multiply and solve.

x = 120

The bakery must bake 120 cookies to fill 20 boxes.

2 ● x = 12 ● 20

2x = 240

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Check Compare the rations. In simplest form, both should be equal.

Are the ratios equal?yes