1) 3,557+x /2=4 то есть вверху дроби (3,557 + х), а внизу 2 ? Тогда такое решение: 3,557 + х = 4 * 2 3,557 + х = 8 х = 8 – 3,557 х = 4,443 Проверка: (3,557 + 4,443) / 2 = 4 8/2 = 4 4 = 4 2) x- 0.731/3=5 х – 0,731 = 5 * 3 х – 0,731 = 15 х = 15 + 0,731 х = 15,731 Проверка: (15,731 – 0,731) / 3 = 5 15/3 = 5 5=5 3) 12.392+x/5=2.365+2.635 (12,392 + х) / 5 = 5 12,392 + х = 5 * 5 12,932 + х = 25 х = 25 – 12,392 х = 12,608 Проверка: (12,392 + 12,608) / 5 = 2,365 + 2,635 25/5=5 5=5 4) 125.95-x/2.65+4.35=6 (125,95 – х) / (2,65 + 4,35) = 6 (125,95 – х) / 7 = 6 125,95 – х = 6 * 7 125,95 – х = 42 х = 125,95 – 42 х = 83,95 Проверка: (125,95 – 83,95) / (2,65 + 4,35) = 6 42/7 = 6 6 = 6