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

12
0
73
7
  
7
  
12
  
19
  
30
  
42
  
54
  

Solution

30
12
0
7
42
12
7
54
19
73
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Triangles with pranksters
Triangles with pranksters

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