Question 1203018
jack is twice as old as jill and six years younger than kathy. 
if jill is h years old, how old is cathy in terms of h? 
"
let j =Jack's age, let h =  Jill's age, let k - Kathy's age
write an equation for each statement
" jack is twice as old as jill"
j = 2h
" and six years younger than kathy."
j = k-6
:
 if jill is h years old, how old is kathy in terms of h? 
replace j with 2h in the above equation
2h = k-6
2h+6 = k
or 
k = 2h+6