We have the following:

A system of linear equations has infinite solutions when the graphs are exactly the same line.
for this to happen, on both sides the value of x must be equal:

replacing:
Answer
A
Step-by-step explanation:
Answer:
Answer to question eight: $152.96
Step-by-step explanation:
$14.12 * 8 pages = $112.96
$0.20 * 200 words = $40
$112.96 + 40 = $152.96
Since the x value can be changed to anything other than 4 (because then you would be dividing by 0 in x-4), the answer is: All real numbers except 4.