Verified answer

см. фото....................

Пошаговое объяснение:

1)

[tex]3(2 - a) + 5a = 6 - 3a + 5a = 6 + 2a[/tex]

2)

[tex] - (8 + 5x) - 4(3x - 3) = - 8 - 5x - 4(3x - 3) = - 8 - 5x - 12x + 12 = - 8 - 17x + 12 = 4 - 17x[/tex]

3)

[tex] - 7(3 + 2n) + 4(5n - 3) = -21-14n+4\left(5n-3\right) =-21-14n+20n-12 =-21+6n-12 =-33+6n [/tex]

4)

[tex] - c(3 + b) - b(2 - c) + 3c = 3\left(-c\right)+\left(-c\right)b-b\left(2-c\right)+3c =3\left(-c\right)+\left(-c\right)b-\left(2b-bc\right)+3c =3\left(-c\right)+\left(-c\right)b-2b-\left(-bc\right)+3c =3\left(-c\right)+\left(-c\right)b-2b+bc+3c =-3c-cb-2b+bc+3c =-3c-2b+3c =-2b [/tex]