Вправи 1201 - 1300 » 1257

1) 4 – х = 21/7 х = 4 – 21/7 х = 37/7 – 21/7 х = 16/7 2) х – 27/13 = 106/13 х = 106/13 + 27/13 х = 1213/13 = 13 3) х + 48/11 = 11 х = 1011/11 – 48/11 х = (10 – 4) + (11/11 – 8/11) х = 63/11 4) 58/19 – х = 24/19; х = 58/19 – 24/19; х = (5 – 2) + (8/19 – 4/19); х = 34/19.