(900 - x) / 6 5 = 4200(900 - x) / 6 = 4200 / 5(900 - x) / 6 = 840900 - x = 6 840900 - x = 5040-x = 5040 - 900-x = 4140x = -4140
Ответ: x = -4140.
(900 - x) / 6 5 = 4200
(900 - x) / 6 = 4200 / 5
(900 - x) / 6 = 840
900 - x = 6 840
900 - x = 5040
-x = 5040 - 900
-x = 4140
x = -4140
Ответ: x = -4140.