Now John is two-thirds as old as Jane. Seven years ago, John was half as old as Jane. How old was each then? This problem requires two tables to organize the data. The equaltion to solve the problem is obtained by relating entries in the two tables. One table is needed to express the now age relationship. One table expresses the 7 years ago relationship. The tables use a factor term formula. The solution needs to relate the two tables, so the unknown in both tables are the same, but the unknown in the ago table is 7 years younger than the unknwon in the now table. Thus the retaltionship between the two tables is: John's now age - 7 = John's ago age. John's now age is 2/3 Jane's age. John's ago age is 1/2 Jane's age 7 years ago. Solving produces the program. Click for the tables, the program. The result of the program.