Answer:
(y = 4 x, y - 4 x = 0)
Explanation:
Expand the following:
(y = 4 x, y - 4 = 4 (x - 1))
4 (x - 1) = 4 x - 4:
(y = 4 x, y - 4 = 4 x - 4)
Subtract 4 x - 4 from both sides of y - 4 = 4 x - 4:
(y = 4 x, y - 4 - 4 x - 4 = (4 x - 4) - 4 x - 4)
(4 x - 4) - (4 x - 4) = 0:
(y = 4 x, y - 4 - (4 x - 4) = 0)
-(4 x - 4) = -(-4) - 4 x:
(y = 4 x, y - 4 + -(-4) - 4 x = 0)
-(-4) = 4:
(y = 4 x, y - 4 + 4 - 4 x = 0)
Grouping like terms, y - 4 + 4 - 4 x = y - 4 x + (4 - 4):
(y = 4 x, y - 4 x + (4 - 4) = 0)
4 - 4 = 0:
Answer: (y = 4 x, y - 4 x = 0)