раскроем скобки
37.8+21x = 71.4
21x-33.6 = 0
21x = 33.6
x = 1.6
раскроем скобки 37.8+21x = 71.4 21x-33.6 = 0 21x = 33.6 x = 1.6
раскроем скобки
37.8+21x = 71.4
21x-33.6 = 0
21x = 33.6
x = 1.6
раскроем скобки 37.8+21x = 71.4 21x-33.6 = 0 21x = 33.6 x = 1.6