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Lesson 3-1 Example 4 3-1 Solve. MP3 PLAYER Xavier had 120 songs on his MP3 player. He added more songs. Write an expression for the total number of songs.

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Presentation on theme: "Lesson 3-1 Example 4 3-1 Solve. MP3 PLAYER Xavier had 120 songs on his MP3 player. He added more songs. Write an expression for the total number of songs."— Presentation transcript:

1 Lesson 3-1 Example 4 3-1 Solve. MP3 PLAYER Xavier had 120 songs on his MP3 player. He added more songs. Write an expression for the total number of songs on Xavier’s MP3 player. Understand Read the problem. Write what you know. Xavier’s songs are expressed by the constant term 120.

2 Lesson 3-1Example 4 3-1 Plan Pick a strategy. One strategy is to use logical reasoning. Determine the operation that should be used in the expression. The phrase “added” indicates addition. Select a variable to represent the number of songs Xavier added. s

3 Lesson 3-1 Example 4 3-1 Solve Write the expression. s + 120

4 Lesson 3-1 Example 4 3-1 Check Does the expression make sense? Xavier will have more songs on his MP3 player after he adds songs.

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