Work out these simultaneous equations. Show your working. 1) -6c + 5d = 67
6c – d = -47

2) -5e + 3f = -37
-e - 3f = 7

3) 7x + 5y = 5
-7x - 6y = 1

4) -4a + b = -33
-5a + 7b = -70

5) -7V + 6w = -79
-5v - 2w = -25

6) 7g + h = 3
-4g - 7h = 24

мария2386    1   13.11.2020 09:16    3