Katie is k years old. Harry is 4 years older than Katie. Rachel is twice as old as Harry. If you add together the ages of Katie, Harry, and Rachel the total comes to 36 years. Algebraically, determine the age of each person.
Why not just translate all that English into Math
Katie --- x
Harry --- x+4
Rachel --- 2(x+4)
x + x+4 + 2(x+4) = 36
take over