Răspuns :
a+7x6-24:3=65
a+42-8=65
a+42=65+8
a+42=73
a=73-42
a=31
verificare
31+7x6-24:3=65
31+42-8=65
73-8=65
65=65
a+42-8=65
a+42=65+8
a+42=73
a=73-42
a=31
verificare
31+7x6-24:3=65
31+42-8=65
73-8=65
65=65