Question

Tolong nomer 6 yaa pake caranya

Answer 1

(4/5)(2^(3x - 2)) + 8^x/20 = 1  (kalikan 20)
16(2^(3x - 2)) + 8^x = 20
2^(4 + 3x - 2) + 2^(3x) = 20
4.2^(3x) + 2^(3x) = 20
5.2^(3x) = 20
2^(3x) = 4
2^3x = 2^2
3x = 2
x = 2/3