Answer:
s = 71
Explanation:
Given that GJ is a midsegment of the triangle then it is half the length of the third side, that is
GJ = 
 HI , so
 HI , so
s - 65 = 
 (s - 59) ← multiply both sides by 2 to clear the fraction
 (s - 59) ← multiply both sides by 2 to clear the fraction
2s - 130 = s - 59 ( subtract s from both sides )
s - 130 = - 59 ( add 130 to both sides )
s = 71