2) (2 1/10-x) / 8 + 1 2/15 = 1 1/3 3) 4 1/6 / (1/4 * x + 1 4/15) - 1 5/6 = 2/3

2) (2 1/10-x) / 8 + 1 2/15 = 1 1/3 (2 1/10-x) / 8 = 1 1/3 -1 2/15  (2 1/10-x) / 8 = 1 5/15 -1 2/15  (2 1/10-x) / 8 = 3/15  (2 1/10-x) / 8 = 1/5 2 1/10-x=1/5*8 2 1/10-x=8/5 2 1/10-x=1 3/5 х=2 1/10-1 3/5 х=2 1/10-1 6/10 х=1 1/10-6/10 х=1-5/10 х=5/10 х=1/2 3) 4 1/6 / (1/4 * x + 1 4/15) - 1 5/6 = 2/3 4 1/6 / (1/4 * x + 1 4/15) = 2/3+1 5/6 4 1/6 / (1/4 * x + 1 4/15) = 4/6+1 5/6 4 1/6 / (1/4 * x + 1 4/15) = 1 9/6 4 1/6 / (1/4 * x + 1 4/15) = 2 3/6 4 1/6 / (1/4 * x + 1 4/15) = 2 1/2 1/4 * x + 1 4/15=4 1/6: 2 1/2 1/4 * x + 1 4/15=25/6: 5/2 1/4 * x + 1 4/15=25/6*2/5 1/4 * x + 1 4/15=5/6*2/1 1/4 * x + 1 4/15=5/3*1/1 1/4 * x + 1 4/15=1 2/3 1/4 * x =1 2/3-1 4/15 1/4*х=1 10/15-1 4/15 1/4*х=6/15 1/4*х=2/5 х=2/5:1/4 х=2/5*4/1 х=8/5 х=1 3/5