Bonjour,

x/(-3/7) = 1

x* 7/-3 = 1

7x/-3 = 1

7x= 1*-3

7x=- 3

x= -3/7

(-3/7)/ (-3/7) =

-3/7 * 7/-3 =  -21/-21 = 1

(3/7)/(-3/7)

3/7 * 7/-3 = 21/-21 = -1

x/( -3/7) = 3

x* 7/-3 = 3

7x /-3 = 3

7x /3*-3 = 3

7x /-9 = 3

7x= 3*-9

7x = -27

x= -27/7 = -3

(-27/7) / (-3/7)

x/(-3/7) = -7

x* 7/-3 = -7

7x /-3 = -7

7x = -7*-3

7x = 21

x = 21/7