Pam is 14 and her dad is 37. In how many years will Pam's dad be twice as old as she will be?
Let those number of years be x
in x years:
Pam will be 14+x
Dad will be 37+x
when is 37+x = 2(14+x)
37+x = 28+2x
=x = -9
x = 9
It will happen 9 years from now
check:
in 9 years, she will be 23 , Dad will be 46
which is twice her age.