Question

СРОЧНО!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

Ответ:

1) 8(6a-7)-17a = 48a-56-17a = 31a-56

2) 6b-7(12-3b) = 6b-84+21b = 27b-84

3) 1,6(c-8)+0,4(8-3c) = 1,6c-12,8+3,2-1,2c = 0,4c-9,6

4) 1,6(9a-3b)-(4b-6a)*1,5 = 14,4a-4,8b-(6b-9a) = 14,4a-4,8b-6b+9a = 23,4a - 4,8b - 6b = 23,4a - 10,8b

5) -(5,7m - 6,7)-(7,9 - 3,6m) = -5,7m + 6,7 - 7,1 + 3,6m = -2,1m + 6,7 - 7,1 = -2,1m - 1,2

6) 15/16(5 1/3x - 4/15y) - 7/23(3 2/7x - 2 4/21y) = 15/16 * (16/3x - 4/15y) - 7/23 * (23/7 - 46/21y) = 5x - 1/4y - x + 2/3y = 4x + 5/12y

Пошаговое объяснение: