Алгебра
Английский
Биология
География
Геометрия
История
Русский
Обществознание
Физика
Химия
Информатика
Литература
МатематикаВопрос:
4) (c - 3) ⋅ 7 =
Ответ:
Используем распределительное свойство умножения: (a - b) ⋅ c = a ⋅ c - b ⋅ c
(c - 3) ⋅ 7 = c ⋅ 7 - 3 ⋅ 7 = 7c - 21
Ответ: 7c - 21
Похожие
- 4) 6p+9p+7-4-
- 5) 15+2+8x-3x=
- 6) 12b-2b+37-7=
- 7) 7+4a+2+a=
- 8) 10m-6m+10-6=
- 9) 15k+1+k+k=
- 10) 30s+s+s+s=
- 14) 8⋅y⋅8=
- 15) n⋅4⋅7=
- 16) 2⋅5k⋅13=
- 17) 15⋅2⋅3c=
- 18) 2⋅4z⋅5=
- 19) 32⋅m⋅3=
- 1) 2x + 6x + 15 = 175, 8x + 15 = 175, 8x = 175 - 15, 8x = 160, x = 160 : 8, x = 20.
- 2) 8a - a + 14 = 126
- 3) 14b - 3b - 20 = 134
- 4) 7m - 4m + 46 = 79
- 5) 16k + k - 1 = 50
- 6) 5 ⋅ 7 ⋅ x = 385
- 7) 9 ⋅ p ⋅ 9 = 162
- 8) 12 ⋅ m ⋅ 5 = 3600
- 9) y ⋅ 4 ⋅ 45 = 180
- 10) a ⋅ 6 ⋅ 15 = 8100
- 1) (3 + a) ⋅ 5 = 3 ⋅ 5 + a ⋅ 5 = 15 + 5a
- 6) 2 ⋅ (12 + b) =
- 11) 16 ⋅ (a + b) =
- 2) (8 + b) ⋅ 2 =
- 7) 9 ⋅ (3 - p) =
- 12) 23 ⋅ (x - y) =
- 3) (x + 4) ⋅ 11 =
- 8) 5 ⋅ (8 + 4t) =
- 13) 12 ⋅ (7 - 2a) =
- 9) 10 ⋅ (2q - 3) =
- 14) (3 - k) ⋅ 13 =
- 5) (5 - d) ⋅ 3 =
- 10) 31 ⋅ (2 + n) =
- 15) 25 ⋅ (m + 4) =
