1) (x-23)/9 = 13x-23 = 9 * 13x-23 = 117x = 117 + 23x = 140
Ответ: x = 140
2) 1728 / (56-x) = 361728 = 36 * (56-x)1728 = 2016 - 36x-36x = 1728 - 2016-36x = -288x = -288 / -36x = 8
Ответ: x = 8
1) (x-23)/9 = 13
x-23 = 9 * 13
x-23 = 117
x = 117 + 23
x = 140
Ответ: x = 140
2) 1728 / (56-x) = 36
1728 = 36 * (56-x)
1728 = 2016 - 36x
-36x = 1728 - 2016
-36x = -288
x = -288 / -36
x = 8
Ответ: x = 8