Question

помогите пжлст 2 и 4 ради бога умоляю ставлю 32 балла​

Answer 1

$x - (0.078 x + 0.68x) = x - 0.758x = 0.242x$

$0.4 \times 0.1 \times a \times 0.8 \times 25 = 0.4 \times 25 \times 0.1 \times 0.8 \times a = 10 \times 0.08 \times a = 0.8a$