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Alexia ran 15 miles in one week. She ran 3 miles on the first day of the week and [tex]z[/tex] miles on the other days of the week. How many miles did she run on the other days of the week?

Write an equation to represent this problem.

[tex]3 + z = 15[/tex]

Answer :

Sure! Let's solve the problem step-by-step.

Alexia ran a total of 15 miles in one week. We know she ran 3 miles on the first day and [tex]\( z \)[/tex] miles on the other days of the week. We need to find out how many miles she ran on those other days.

1. Understand the Total Distance:
- The total distance Alexia ran over the week is given as 15 miles.

2. Identify the Known Distance:
- She ran 3 miles on the first day.

3. Set Up the Equation:
- Let's express the total distance [tex]\( 15 \)[/tex] miles as a sum of the miles she ran on the first day and the other days.
- The equation representing this relationship is:
[tex]\[
3 + z = 15
\][/tex]
- Here, [tex]\( z \)[/tex] represents the total miles she ran on the other days of the week.

4. Solve the Equation:
- To solve for [tex]\( z \)[/tex], subtract 3 miles (the miles she ran on the first day) from 15 miles (the total miles ran):
[tex]\[
z = 15 - 3
\][/tex]

5. Calculate the Result:
- By calculating [tex]\( 15 - 3 \)[/tex], we find that:
[tex]\[
z = 12
\][/tex]

Therefore, Alexia ran 12 miles on the other days of the week.

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