Question

СРОЧНО!!!
Решите пожалуйста, надо раскрыть скобки и решить

Answer 1

1). -(5a - 3b) - (2 + 5a - 3b) + 2 = -5a + 3b - 2 - 5a + 3b + 2 =

  = 6b - 10a;

2). (1 - 9y) - (22y - 4) - 5 = 1 - 9y - 22y + 4 - 5 = -31y;

3). 3(8a - 4) - 2(3a + 2) + 13 = 2a - 12 - 6a - 4 + 13 = -4a - 3;

4). 12 - 6(2 - x) + 3(x - 2) = 12 - 12 + 6x + 3x - 6 = 9x - 6;

5). 9 + 3(3x - 1) - 4(2x + 3) = 9 + 9x - 3 - 8x - 12 = x - 6;

6). -(2x - 7) - 5(3x - 1) = -2x + 7 - 15x + 5 = -17x + 12;

7). -2(x + 3) - 3(3x - 4) = -2x - 6 - 9x + 12 = -11x + 6 =

 = -11 · (-0,4) + 6 = 4,4 + 6 = 10,4

8). 3(2x - 5) - 4(6 + 3x) = 6x - 15 - 24 - 12x = -6x - 39 =

 = -6 · (-0,8) - 39 = 4,8 - 39 = -34,2

9). a - (2x - (2a - x)) = a - 2x + 2a - x = 3a - 3x;

10). b - (2c - (3b + (4c - 5b))) = b - 2c + 3b - 4c + 5b = 9b - 6c;