Answer:
K=4
Y=16
X=4
Step-by-step explanation:

To answer the question above, know that one of the way of writing the equation of the line is through the point - slope form which is generally expressed as,
y - y1 = m(x - x1)
where m is the slope and x1 and y1 are the abscissa and ordinate of the point, respectively.
Substituting the given data to the equation above,
y - 5 = -1(x -0)
By simplification we get an answer of
y = -x + 5
Answer:
x=8
Step-by-step explanation:
2(x+4)=4x-8
2x+8=4x-8
2x+8-8=4x-8-8
2x=4x-16
2x-4x=4x-16-4x
-2x=-16
Divide by -2 on both sides
and get... X=8