Question

Karen makes $7 per hour babysitting and $
11 per hour giving music lessons. One
weekend, she worked a total of 25 hours
and made $243. How many hours did she
spend giving music lessons?
Write the two equations, then answer the
question.

Answer 1

Answer:

Let b = number of hours babysitting and

m = number of hours giving music lessons.

7b + 11m = 243---->7b + 11m = 243

b + m = 25------>7b + 7m = 175

---------------------

4m = 68

m = 17, b = 8

Karen spent 17 hours giving music lessons.