(3 1/3 - n) +1 4/3= 3 5/3 + 2/3
( 3 1/3 - n ) + 1 4/3 = 3 5/3 + 2/3 3 1/3 - n = 3 7/3 - 1 4/3 3 1/3 - n = 2 3/3 n = 3 1/3 - 3 n = 1/3