Răspuns :
2^12 : 2a = 2^5
2a = 2^12 : 2^5
2a = 2^7
a = 2^7 : 2^1
a = 2^6
Verificare:
2^12 : 2 × 2^6 = 2^12 : 2^7 = 2^5
2a = 2^12 : 2^5
2a = 2^7
a = 2^7 : 2^1
a = 2^6
Verificare:
2^12 : 2 × 2^6 = 2^12 : 2^7 = 2^5