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a) 2 la puterea 12÷2a=2 la puterea 5;

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
2¹²:2a = 2⁵

2a = 2¹²:2⁵

2a = 2⁷

a = 2⁷:2

a = 2⁶