X+ (x+2)+ (x+4)= -21
3x+6=-21
3x=-27
x=-9
Final answer: -9, -7, -5
Step-by-step explanation:
y/3 =x
y = 3x .
hope this helps you.
<u>Answer:
</u>
In 3 hour 15 minutes Dennis will walk 9.2072 miles.
<u>Solution:
</u>
It is given that Dennis can walk 2.833 miles each hour. We have to find how far will he walk in 3 hours 15 minutes.
We first convert 15 minutes in hour. To convert 15 minutes in hour we divide 15 by 60.

Therefore 3 hours 15 minutes can be written as 
Now,
In 1 hour dennis can walk 2.833 miles

Thus in 3 hour 15 minutes Dennis will walk 9.2072 miles.
The factor "x" is the number 6