Let
x--------> the total length of the water main
we know that
the number of 20 ft pipes is x/20
and
the number of 18 ft pipes is x/18
Since they differ by 14 pipes,
we have the equation
x/18 - x/20 = 14
Solve for x (by canceling fractions)
20x - 18x = 14*18*20
x = (14*18*20)/2
x = 2,520 ft
therefore
the answer is
the total length of the water main is 2,520 ft
David cuts his one roll into 1/8s, which means that he will have 8 cookies at the end.
Jake cuts his roll into 1/7s, which means his will have 7 cookies at the end (however, they would be a bit larger)
So your answer is: David will have the most cookies, and he will have 1 more cookie
hope this helps
309x+412
X=309 over 412
X=3 over 4
13 you had to round 12/5 to a whole :) :) :) :)
