Х : (-14 2/7) + 19 × у + 87,5 : z при x = -42 6/7 ; у =-0,3, z =-125

Решите задачу:

$- 42 \frac{6}{7} \div ( - 14 \frac{2}{7} ) + 19 \times ( - 0.3) \\ + 8.75 \div ( - 125) = - 2.77$
$- 42 \frac{6}{7} \div ( - 14 \frac{2}{7} ) = \frac{300}{7} \div \frac{100}{7} = \\ \frac{300}{7} \times \frac{7}{100} = 3$
$19 \times ( - 0.3) = - 5.7$
$8.75 \div ( - 125) = - 0.07$
$3 - 5.7 = - 2.7$
$- 2.7 - 0.07 = - 2.77$