Among the students reading in the reading room, there were 15 more boys than girls. Later, the number of boys decreased by two fifths and that of girls by one fifth. The number of the remaining boys and girls was equal. How many students were reading in the reading room? [equation solution]

Among the students reading in the reading room, there were 15 more boys than girls. Later, the number of boys decreased by two fifths and that of girls by one fifth. The number of the remaining boys and girls was equal. How many students were reading in the reading room? [equation solution]

There are x boys and y girls
x=y+15
x(1-2/5)=y(1-1/5)
x=60
y=45
The total number is 105