SOLUTION: http://postimg.org/image/55lbvtaxl/ this puzzle

Question 935728: http://postimg.org/image/55lbvtaxl/
this puzzle
Answer by MathLover1(20855) (Show Source): You can put this solution on YOUR website!

it should be
as I see, there is a pattern: start in left vertices,subtract a number from second point, and add the number from third point, and put result in the middle
first triangle:
second triangle:
third triangle:
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