X — 2% 1000 кг — 100% Найдем значение x: x = 2% ∙ 1000 / 100% = 20кг
20 + K — 12% 1000 + K — 100%
(20 + K) ∙ 100% = (1000 + K) ∙ 12% 2000 + 100K = 12000 + 12K 100K – 12K = 12000 – 2000 88K = 10000 K = 10000 / 88 = 113(56/88) = 113(7/11) ≈ 114 ОТВЕТ: 114