X+9 11/20=22 1/2-10 7/12
Х + 9 11/20 = 22 1/2 - 10 7/12 22 1/2 - 10 7/12 = 22 6/12 - 10 7/12 = 21 18/12 - 10 7/12 = 11 11/12 Х + 9 11/20 = 11 11/12 Х = 11 11/12 - 9 11/20 11 11/12 - 9 11/20 = 11 55/60 - 9 33/60 = 2 22/60 = 2 11/30 Х = 2 11/30
X+9 11/20=22 1/2-10 7/12 х+9 11/20=11 11/12 х=11 11/12-9 11/20 х=2 11/30