3 * (12 - 12 : x) + 35 = 53
3(12 - 12/x) = 53 - 35 = 18
12 - 12/x = 18 : 3 = 6
12 - 6 = 12/x
x = 12 : 6 = 2
Ответ: x = 2.
14 : (x - 54) * 3 + 28 = 34
14/(x - 54) * 3 = 34 - 28 = 6
x - 54 = 14/3 : 6
x = 54 + 14/18 = 54 7/9
Ответ: x = 54 7/9.
3 * (12 - 12 : x) + 35 = 53
3(12 - 12/x) = 53 - 35 = 18
12 - 12/x = 18 : 3 = 6
12 - 6 = 12/x
x = 12 : 6 = 2
Ответ: x = 2.
14 : (x - 54) * 3 + 28 = 34
14/(x - 54) * 3 = 34 - 28 = 6
x - 54 = 14/3 : 6
x = 54 + 14/18 = 54 7/9
Ответ: x = 54 7/9.