1) 1/2а + 1/3а - 1/4а = 6/12а + 4/12а - 3/12а = 7/12а при а = 1 5/7 = 7/12 * 12/7 = 1a
2) 4/7b + 5/21b - 2/3b = 12/21b + 5/21b - 14/21b = 3/21b при b = 2 1/3 = 3/21 * 7/3 = 1/3b
3) 1 5/12 m + 2 7/18 m - 1 2/9m = 1 15/36m + 2 14/36m - 1 8/12m = 31/12 * 1 17/31 = 31/12 * 48/31 = 1/1 * 4/1 = 4
1) 1/2а + 1/3а - 1/4а = 6/12а + 4/12а - 3/12а = 7/12а при а = 1 5/7 = 7/12 * 12/7 = 1a
2) 4/7b + 5/21b - 2/3b = 12/21b + 5/21b - 14/21b = 3/21b при b = 2 1/3 = 3/21 * 7/3 = 1/3b
3) 1 5/12 m + 2 7/18 m - 1 2/9m = 1 15/36m + 2 14/36m - 1 8/12m = 31/12 * 1 17/31 = 31/12 * 48/31 = 1/1 * 4/1 = 4