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Triangles with pranksters

Instructions:

Insert numbers into empty fields in triangle (grape). The sum of two neighbouring numbers in one row must be equal to number below those fields. You may use only "pranskters" - numbers, which are known and located below triangle (grape).

Example

9
3
20
14
  
17
  
23
  
23
  
40
  
40
  
80
  

Solution

9
14
3
20
23
17
23
40
40
80

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