This problem single handedly screwed my quant section this week. I can't remember the exact numbers involved, but it was something like:
'n' parents split the $300 cost of a school trip equally. If the school had three less parents, each the parents would each pay an additional $3. Find 'n'
my method was...
300/n = x
300 = nx
and
300/n-3 = x +3
300 = nx + 3n - 3x - 9
sub nx = 300
300 = 300 + 3n - 3x - 9
9 = 3(n - x)
3 = n - x
.... then I don't know, not sure if I'm even doing this right.
...
'n' parents split the $300 cost of a school trip equally. If the school had three less parents, each the parents would each pay an additional $3. Find 'n'
my method was...
300/n = x
300 = nx
and
300/n-3 = x +3
300 = nx + 3n - 3x - 9
sub nx = 300
300 = 300 + 3n - 3x - 9
9 = 3(n - x)
3 = n - x
.... then I don't know, not sure if I'm even doing this right.
...