Question

Срочно! Даю 30 баллов

Answer 1

$2(4a + 3b) - 3(2a + 6b) = 8a + 6b - 6a - 18b = \\ = - 12b + 2a = - 2(6b - a) = - 2 \times ( - 1.9) = 3.8$