(х - 2) : 5 =7
(x - 2) = 7 * 5
х - 2 = 35
х = 35 + 2
х = 37
Проверка:
(37 - 2) : 5 = 35 : 5 = 7
7 = 7
x : 3 - 2 = 8
x : 3 = 8 + 2
x : 3 = 10
x = 10 * 3
x = 30
Проверка:
30 : 3 - 2 = 10 -2 = 8
8 = 8
(x +1) : 4 + 1 = 7
(x + 1) : 4 = 7 - 1
(x + 1) : 4 = 6
x + 1 = 6 * 4
x + 1 = 24
x = 24 - 1
x = 23
Проверка:
(23 + 1) : 4 + 1 = 24 : 4 + 1 = 6 + 1 = 7
7 = 7
10 : (x - 1 ) = 5
x - 1 = 10 : 5
x - 1 = 2
x = 2 + 1
x = 3
Проверка:
10 : (3 - 1 ) = 10 : 2 = 5
5 = 5
16 : (x + 2) - 1 = 7
16 : (x + 2) = 7 + 1
16 : (x + 2) = 8
x + 2 = 16 : 8
x + 2 = 2
x = 2 - 2
x = 0
Проверка:
16 : (0 + 2) - 1 = 16 : 2 - 1 = 8 - 1 = 7
10 - 16 : x = 6
16 : x = 10 - 6
16 : x = 4
x = 16 : 4
x = 4
Проверка:
10 - 16 : 4 = 10 - 4 = 6
6 = 6