Aidez-moi svp deux ex 37et45 merci

37)
5x + 7 = - 7x - 6

a) 5x = - 7x - 13
b) 12x + 7 = - 6
c) 7 = - 12x - 6
d) 5x = - 13 - 7x

45)
a)
3 + 4 (2x - 1) = 3 (x + 5) - 2
3 + 8x - 4 = 3x + 15 - 2
8x - 3x = 15 - 2 - 3 + 4
5x = 14
x = 14/5

b)
- 3 - 7 (2x + 2) = 4 (- 1 - x)
3 - 14x - 14 = - 4 - 4x
- 14x + 4x = - 4 - 3 + 14
- 10x = 7
x = - 7/10