Răspuns:
Explicație pas cu pas:
3^(2n-3) = 27^7 : 9^2 = (3^3)^7 : (3^2)^2 = 3^21 : 3^4 = 3^17
2n - 3 = 17
2n = 3 + 17 = 20
n = 20 : 2 = 10
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5^(3n+1) = 25^11 = (5^2)^11 = 5^22
3n + 1 = 22
3n = 22 - 1 = 21
n = 21 : 3 = 7
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7^(n+1) : 7^4 = 49^8 = 7^16
n + 1 - 4 = 16
n = 16 + 4 - 1 = 19
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10^(2n+1) : 5^(2n+1) = 8^9
10^(2n+1) = 2^(2n+1)*5^(2n+1)
2^(2n+1)*5^(2n+1) : 5^(2n+1) = (2^3)^9
2^(2n+1) = 2^27
2n+ 1 = 27
2n = 27 - 1 = 26
n = 26 : 2 = 13
