Poziom A a) 4 * x - 3 + 5 * x = 15 b) 5 * x + 7 - 3 * x = 13 c) 7 * x - 2 - 6 * x = 5 d) 6 * x - 4 + 4 * x = 56 Poziom B a) 6 * x = 2 * x - 8 b) 8 * x = 9 + 5 * x c) 7 * x = 2 * x - 20 d) 2 * x = 12 - 2 * x Poziom C a) 8 - 3 * x = 6 * x - 10 b) 7 * x - 4 = 9 + 8 * x c) -5 + 7 * x = 2 * x - 20 d) 8 - 2 * x = -4 + 2 * x