Answer: the number of hours that Kaylee worked walking dogs last week is 3 hours.
the number of hours that Kaylee worked landscaping last week is 5 hours.
Explanation:
Let x represent the number of hours that Kaylee worked walking dogs last week.
Let y represent the number of hours that Kaylee worked landscaping last week.
Kaylee is working two summer jobs making six dollars per hour walking dogs and $13 per hour landscaping.
Last week, she earned a total of $83. It means that
6x + 13y = 83- - - - - - - - - - - -1
Last week kaylee worked a total of eight hours. It means that
x + y = 8
Substituting x = 8 - y into equation 1, it becomes
6(8 - y) + 13y = 83
48 - 6y + 13y = 83
- 6y + 13y = 83 - 48
7y = 35
y = 35/7
y = 5
x = 8 - y = 8 - 5
x = 3