For example: "Jennifer bought a notebook and three pens for $7. If each pen costs $1.50, how much did the notebook cost?"

**Solution:**

To solve this problem, students must first assign a variable, such as "c" to represent the cost of the notebook. Then, they can write an equation that represents the total cost: c + 3(1.5) = 7.

c + 4.5 = 7

Isolate c by using inverse operation.

c + 4.5 = 7

c = 7 - 4.5

c = 2.5

Therefore, the cost of the notebook is $2.5.

For example: "Jennifer bought a notebook and three pens for $7. If each pen costs $1.50, how much did the notebook cost?"

**Solution:**

To solve this problem, students must first assign a variable, such as "c" to represent the cost of the notebook. Then, they can write an equation that represents the total cost: c + 3(1.5) = 7.

c + 4.5 = 7

Isolate c by using inverse operation.

c + 4.5 = 7

c = 7 - 4.5

c = 2.5

Therefore, the cost of the notebook is $2.5.

For example: "Jennifer bought a notebook and three pens for $7. If each pen costs $1.50, how much did the notebook cost?"

**Solution:**

To solve this problem, students must first assign a variable, such as "c" to represent the cost of the notebook. Then, they can write an equation that...

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