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