Question

1)(-2,6а-в+1,4с)*(-2)
2)3(7а-2+5к)
3)-4(x+5y-8z)
4)-4(в-4)+7(b+2)
Срочно!!!!!!!!!!!!!! Позязяяя

Answer 1

1)(-2,6а-в+1,4с)*(-2) = 5,2a + 2b - 2,8c
2)3(7а-2+5к) = 21a - 6 + 15k
3)-4(x+5y-8z) = - 4x - 20y + 32z 
4)-4(в-4)+7(b+2) = - 4b + 16 + 7b + 14 = 3b + 30

Answer 2

2. 21a-6+15k
3. -4x-20y+32z
4. -4b+16+7b+14=3b+30=3•(b+10)