140 words divided by 4 minutes = 35 words per minute
14000+7x=35x (x being the number of books) solve for x and you have your answer. 14000=35x-7x=28x therefore x=14000/28=500 so he needs to sell 500 books before he breaks even.
Answer:
y=-4
Step-by-step explanation:
If y=4x
and y=-1
y=-1×4
y=-4
