Andrew M. answered 09/25/17
Tutor
New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors
Hi Heather; From the information given we can make
two equations and then solve the system.
Let m = Michelle's age
Let s = Sarah's age
m = 5s - 10 {equation 1}
m + s = 44 {equation 2}
In 2nd equation replace m with 5s - 10
and we can solve for s to find Sarah's age:
5s - 10 + s = 44
6s - 10 = 44
6s = 54
s = 9
Sarah is 9 years old
m = 5s - 10 = 45-10 = 35 years old for Michelle