11/18 is the correct answer:))
The answer is 7 because x+3 is 10. Hope this helped
Y = kx, so y/x is constant
you want y such that
y/12 = -2/-8
We have similar triangles so
12/x = (12+78)/(x+13)
We can skip some algebra by doing the ratio on the pieces. We'll show it works at the end.
12/x = 78/13
x = 12(13)/78 = 2
We check
12/2 = 6
(12+78)/(2+13) = 90/15 = 6, good
Answer: x=2
