Respuesta :

-9 would be your answer 

Let the unknown number be x . Given Two-thirds of a number is negative six.

Two third of the number x can be written as :[tex] \frac{2}{3} x [/tex]

Given this equals -6.

[tex] \frac{2}{3} x =- 6 [/tex]

To solve for x we multiply by 3 both sides

2x=-18

Dividing both sides by 2 we have:

x=-9.

The unknown number is -9.