The answer to your questions is: 4, 2
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:
(x,−2x+8)(x,-2x+8)
Equation Form:x=xy=−2x+8
You would end up paying $3049.2
Answer:

Step-by-step explanation:
General equation of a line:

m is the slope, and c is the y-intercept:
m = 3, and c = 7