Answer:
Step-by-step explanation:
Let ticket for students be x
Let ticket for adults be y
x + y = 127..........(1)
3x + 6y = 447......(2)
Making x as subject in (1)
x = 127 - y......(3)
Substituting in (2)
3(127 - y) + 6y = 447
381 - 3y + 6y = 447
3y = 447 - 381
3y = 66
y = 66/3
y = 22
And x = 127 - y
x = 127 - 22
x = 105
105 tickets were sold to student and 22/ticket were sold to adults