tolong di bantu ya, sebisanya soalnya saya kurang paham.

1.a 2^[x] = 2³
     x      = 3
b. 2^[3x -1] = 2^[8]
        3x -1   = 8
              3x = 9
                x = 3
c. 2^[x+3] = 2^[3x+5]
          x+3 = 3x+5
         x-3x = 5-3
           -2x = 2
              x = -1