Răspuns :
4⁷ = (2²)⁷ = 2¹⁴
8⁵ = (2³)⁵ = 2¹⁵
(5*2¹⁶ +2¹⁴ -2¹⁵) /(x-3) = 19/2
2¹⁴(5* 2²+1-2) / (x-3) = 19/2
2¹⁵(20-1)/(x-3) = 19
2¹⁵* 19 = 19(x-3)
x-3 = (2¹⁵*19)/19
x-3 = 2¹⁵
x = 2¹⁵ +3
4⁷ = (2²)⁷ = 2¹⁴
8⁵ = (2³)⁵ = 2¹⁵
(5*2¹⁶ +2¹⁴ -2¹⁵) /(x-3) = 19/2
2¹⁴(5* 2²+1-2) / (x-3) = 19/2
2¹⁵(20-1)/(x-3) = 19
2¹⁵* 19 = 19(x-3)
x-3 = (2¹⁵*19)/19
x-3 = 2¹⁵
x = 2¹⁵ +3