There are ways to solve word problems and the following is two strategies for solving an algebra problem.
Problem
10 years ago Bob was three times as old as Sallie was, 10 years from now Bob will be twice as old.
What is Bob’s present age?
a. 30 years
b. 50 years
c. 60 years
d. 70 years
e. 80 years
Solving Problem Technique #1
We know [...]