(4 1/9 - а) + 8 5/9=9 2/9 37/9 - a + 77/9 - 83/9 = 0 -a = -31/9 -1) a = 31/9 = 3 4/9 5 3/7 - (b-2 1/7)=2 4/7 38/7 - b + 15/7 - 18/7 = 0 -b = -35/7 -1) b = 35/7 = 5