-3(x+n)=x
solve for x

x = (-n/2)

Step-by-step explanation:

-3(x+n)=x      Problem:

-3x-n=x         Distributive property

-n=2x            Add 3x to both sides

2x=-n            Switch equation around to make it easier to look at

x= -n/2          Divide by 2 on each side

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,