Select the correct answer. It takes Greg and Nikki a total of 40 minutes to paint a room if they work together. If Greg works alone, he takes 18 minutes longer to paint he
room than Nikki takes if she works alone.
When x represents the number of minutes it takes Nikki to paint the room working alone, the situation is represented by this equation:
1/x + 1/x+18 = 1/40
Which value is a solution of the rational equation that must be discarded because of the context?
А.
x = 0
B.
x= -10
С.
X = -18
D
x= -72