Question

Помогите решить все задания срочно нужно

Answer 1

1)
$- 2(8a + 7b) + 4(a - 2b) = - 16a - 14b + 4a - 8b = - 12a - 22b$
2)
$5(2x - 3) - 2(3 - 2x) = 15 - 6(x + 1) \ 10x - 15 - 6 + 4x = 15 - 6x - 6 \ 10x + 4x + 6x = 15 - 6 + 15 + 6 \ 20 x = 30 \ x = 30 div 20 \ x = 1 times frac{1}{2}$
4)
$frac{19}{12} + frac{41}{7} div ( frac{12}{5} - frac{25}{7}) = frac{19}{12} + frac{41}{7} div ( frac{84}{35} - frac{125}{35}) = frac{19}{12} + frac{41}{7} div ( - frac{41}{35} ) = frac{19}{12} - frac{41}{7} times frac{35}{41 } = frac{19}{12} - 5 = - frac{41}{12} = - 3 frac{5}{12}$
3 и 5 задание я не знаю

Answer 2

Спасибо