we have

If c is the independent variable
then
p is the dependent variable
so
clear variable p

Divide by
both sides

Adds
both sides


Write the equation in function notation

therefore
the answer is
the equation in function notation is equal to 
((x^2-3x-18)/(x+3))
((x-6)(x+3))/(x+3)
The x+3 on top cancels out the x+3 on the bottom so all you have left is
x-6
Hope I didn't mess up for your sake!
Answer:
The line given is equal to y=-x+7 (Through rearranging)
To find the new line, we substitute the given coordinates (5,8) in the equation without the given y-intersect (+7):
-8=-5+c
c=-3
The line parallel to x+y=7 that passes through the point (5,-8) is y=-x-3
I only know how much does the fruit costs per pound is $4.82