Cevap :
Güven = x
Erdem = y
Çağrı= z
x+y = 85 güven erdem
y+z = 89 çağrı erdem
x+z =88 güven çağrı
2x+2y+2z= 262 her iki tarafı ikiye bölerim
x+y+z = 131 y+z= 89 olduğuna göre
131-89 = 42 güven= 42 kg
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