It is given that
On Monday, only Arjun worked and painted 8 classrooms.
Roberto painted 4 classrooms per hour while
Arjun painted 2 classrooms per hour
Let t be the number of hours.
Roberto painted the same number of total classrooms as Arjun over
both days.
On the first day, Arjun painted 8 classrooms.
The number of hours Arjun worked=
The number of rooms Roberto can pint in 4 hours is
If Arjun work 4 hours on second, the number of rooms pained by him is
Roberto painted the same number of total classrooms as Arjun over
both days.
Let t=4, we get