³√25 pangkat x+4 = 125 pangkat x+1

³√25^x+4 = 125^x+1

³√(5²)^x+4 = (5³)^x+1

5^2x+8/3 = 5^3x+3

=> (2x + 8) / 3 = 3x + 3

=> 2x + 8 = 3(3x + 3)

=> 2x + 8 = 9x + 9

=> 2x - 9x = 9 - 8

=> - 7x = 1

=> x = - ¹/7