(dads age:  28 years old   when  cindys age : 2 years old .)
( dads age:   36 years old when cindys age:10 years old .)
 (dads age : ? when cindys age :18 yrs old)
A) write an equation that relates cindys age to her dads age .
B)determine if 42 is a solution to the equation. Show
 your work.
C) explain the meaning of your answer in part B.