Question

please tell me answer ​

Answer 1

x=2

2^3x+1 ×10 = 1280

2^3x+1 = 1280/10= 128

2^3x+1 = (2)⁷

therefore, 3x+1 = 7

3x= 7-1

3x= 6

x= 6/3

x=2