Question

Упросите выражения: (помогите))
1) -4,2x*(-6y)=
2) 8m+5p-13m-p=
3)k-(17-k)+(-k+30)=
4) -6(4+a)+8(a-6)=

Answer 1

1) $- 4.2x times ( - 6y) = 25.2xy$

2) $8m + 5p - 13m - p = 8m - 13m + 5p - p = - 5m + 4p$

3) $k - (17 - k) + ( - k + 30) = k - 17 + k - k + 30 = k + k - k - 17 + 30 = k + 13$

4) $- 6(4 + a) + 8(a - 6) = - 24 - 6a + 8a - 48 = - 6a + 8a - 48 - 24 = 2a - 72$