SureMath - the math software for 21st
solving - was used to solve this problem.
Downlo ad SureMath file.
Note the generous use of words in the verbal statements in the solution shown above. This is necessary for reliable problem solving. It is the thinking process and trying to carry the process entirely in the head is not possible. Short pencil is better than long memory. (Computer solution is even better!)
The problem solution was developed by
Howard C. McAllister using