Question

помогите пожалуйста!

Answer 1

6) 1) Г 2) В 3) Д 4) Б

$- 4(x - 3) = - 4 \times x - 4 \times ( - 3) = - 4x + 12$

$- 3(x + 4) = - 3 \times x - 3 \times 4 = - 3x - 12$

$3 - (x - 4) = 3 - x + 4 = 7 - x$

$- 4 + 2(3 - x) = - 4 + 2 \times 3 + 2 \times ( - x) = - 4 + 6 - 2x = 2 - 2x$

7) 20b - 15

$- 5(4 - 5b) - 2.5(2b - 2) = - 20 + 25b - 5b + 5 = 20b - 15$

8) 12 - n

$- n - (n - 25) - (13 - n) = - n - n + 25 - 13 + n = 12 - n$

9) - 6n - 2m

$- 5n + 4m - 6m - n = ( - 5 - 1)n + (4 - 6)m = - 6n - 2m$