№6. Решите уравнения: (128 + 49) - x = 28; x - (133 + 75) = 32; 900 : (210 + x) = 36.

1. (128 + 49) - x = 28, 177 - x = 28, x = 177 - 28, x = 149. 2. x - (133 + 75) = 32, x - 208 = 32, x = 208 + 32, x = 240. 3. 900 : (210 + x) = 36, 210 + x = 900 / 36, 210 + x = 25, x = 25 - 210, x = -185.