The sum of the ages of Michael and Leah is 71 years. 10 years ago, Michael's age was 2 times Leah's age. How old is Michael now?
x = Michael
y = Leah
Ten years ago:
x + y = 51
3y = 51
y = 17
Leah was 17
Michael was 34
34 + 10 = 44 years old