Answer :
16 + x/3 = 3x
(16 + x/3) * 3 = 3x * 3
48 + x = 9x
48 + x - x = 9x -x
48 = 8x
48 / 8 = 8x / 8
6 = x
(16 + x/3) * 3 = 3x * 3
48 + x = 9x
48 + x - x = 9x -x
48 = 8x
48 / 8 = 8x / 8
6 = x