Răspuns :
120 - (35+25+30) = 120 - 90 = 30
30 : 3 = 10
primul sac are = 35 +10 =40
al 2 lea sac are = 25+10 = 35
al 3 lea sac are = 30 +10 = 40
30 : 3 = 10
primul sac are = 35 +10 =40
al 2 lea sac are = 25+10 = 35
al 3 lea sac are = 30 +10 = 40