4целых 2/9x+3целых 5/14=6целых 11/21

4 2/9х+3 5/14= 6 11/214 2/9х= 6 11/21-3 5/144 2/9х = 6 22/42-3 15/424 2/9х = 3 7/424 2/9х = 3 6/738х/9=27/7Х= 27/7:38/9Х= 27/7*9/38Х= 243/266

4,2/9x+3,5/14=6,11/214,2/9х = 6,11/21-3,5/144,2/9х = 12,22/42 - 10,5/424,2/9х = 1,72/421/9х = 1,72/42/4,21/9х = 1,72/101/9х = 0,1721/х = 0,172 * 9 = 1,548х = 1/1,548 = 0,65