Question

помогите пжпжпжпжпжпжпжпжпжжпжпжп 2) -0,2c + 1,4d;​

Answer 1

$- 0.2c + 1.4d = - \frac{1}{5}c + \frac{7}{5}d = - \frac{1}{5} \times (c - 7d) = - 0.2(c - 7d)$