Question 1053932
The cost is the same 1200, whatever that money unit.


How many tourists planned?  v.
p for price for each of the planned v tourists.


{{{system(vp=1200,(v-3)(p+20)=1200)}}}
Think very carefully about this before going further.


{{{CountOfTourists*Price=Cost}}}


Planned situation is for an expected number of tourists and the expected price, for the given cost.


Actual situation did not change cost.  Fewer tourists pay a higher price EACH and still together pay the same cost as planned.


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Now, solve the system and find v and p.