Ask a question about the transformation of unit "1" I don't know how to do it One third of the original students of grade 6 participated in the composition contest, and then five students took the initiative to participate. The actual number of participants was 3 / 5 of the rest. How many people actually participated in the contest?

Ask a question about the transformation of unit "1" I don't know how to do it One third of the original students of grade 6 participated in the composition contest, and then five students took the initiative to participate. The actual number of participants was 3 / 5 of the rest. How many people actually participated in the contest?

Let X be the actual number of participants and y be the number of the whole class. Later, five students took the initiative to participate, indicating that the original number of participants was X-5; one third of the original students took part, that is: (X-5) / y = 1 / 3 (1) the actual number of participants was 3 / 5 of the rest, that is: X / (Y-X) = 3 / 5 (2) the simultaneous equations (1) and (2) were binary and one