A simple word problem . This is a continuation of the discussion on the word or story problems. Inessential details must be left out.
Many formulations are possible for a single problem.
One of the numbers is known, another is not. One of the numbers at hand exceeds the second number by a given factor. One is the number on the right - b. A quick solution to the equation is obtained following a rule similar to Euclid's if equals be divided into equals, the results are equal. The problem is solved.