Question

Подоможіть помогите

Answer 1

$0.8(3x - 14) - 0.3(4 - 5x) = 2.4x - 11.2 - 1.2 + 1.5x = 3.9x - 12.4$

при х = 3 1/13:

$\frac{39}{10} \times 3 \frac{1}{13} - 12.4 = \frac{39 \times 40}{10 \times 13} - 12.4 = 12 - 12.4 = - 0.4$

ответ: -0,4