-4 8/11 + 2 8/11 + 11 1/7 - (5 4/7 + 3 6/7) = -2 + 2 + 11 1/7 - (9 10/7) = 0 + 11 1/7 - 9 10/7 = 11 1/7 - 9 10/7 = 1 3/7
(x - 1 8/9) + 3 7/9 = 4 4/9x - 1 8/9 + 3 7/9 = 4 4/9x - 1 8/9 + 3 7/9 = 40/9x - 17/9 + 34/9 = 40/9x + 17/9 = 40/9x = 40/9 - 17/9x = 23/9
-4 8/11 + 2 8/11 + 11 1/7 - (5 4/7 + 3 6/7) = -2 + 2 + 11 1/7 - (9 10/7) = 0 + 11 1/7 - 9 10/7 = 11 1/7 - 9 10/7 = 1 3/7
(x - 1 8/9) + 3 7/9 = 4 4/9
x - 1 8/9 + 3 7/9 = 4 4/9
x - 1 8/9 + 3 7/9 = 40/9
x - 17/9 + 34/9 = 40/9
x + 17/9 = 40/9
x = 40/9 - 17/9
x = 23/9