а)5/9x=2 целых 1/3 б)14 /39разделить x 21 /52

а) 5/9х = 2 1/3
    5/9х = 7/3
     х = 7/3 : 5/9
     х = 7/3 * 9/5
     х = 63/15 = 21/5 = 4 1/5

б) 14/39 : х = 21/52
    х = 21/52 * 14/39
    х = 294/2028 = 49/338