Hi magentarita

I am not a mathematician but even then I would like to share my point of view.

Word problem is actually about conversion of verbal statements to a mathematical form that can further be manipulated.one should have good control over basics and should have a good observation.there is no single algorithm for solving such problems.just convert each statement to a mathematical form then manipulate mathematically to get the result.keep in mind that more the number of variables more difficult will become the elimination to get the value of some specific variable.you should use or atleast observe every possible relation that the problem can give. more the relations, greater will be the chances of solving.

Hope this helps.