Simplify and determine the coefficient of (-x)(). a.-4 b.1/3 c.1 d.4

The coefficients in the equation (-x)(3y)(-2x) are the constants -1, 3, and -2. 
In order to simplify and determine only one coefficient we should multiply all  three constants together to get only one numerical constant .
The commutative law says hat you can rearrange a multiplication any way you want. so, (-1)*3*(-2)=(-3)*(-2)=6
The equation can be also simplified written as:
6x^2y
None of the option is the solution.

With a continuous thought process.