Johnny and David

Question

Johnny has 8x - 9 pairs of sneakers and David has 6x + 4 pairs of sneakers. How many more pairs of sneakers does Johnny have than David?

Answer 1

To find how many more pairs of sneakers Johnny has, you would subtract the two expressions:

(8x - 9) - (6x + 4) = 8x -9 - 6x - 4 = 2x -13

Johnny would have 2x - 13 more pairs of sneakers.

Answer 2

lim (8x -9) / (6x + 4) as x -> infinite = 4/3 or 1.3333....

meaning that at some n >= N where N = 6.5 then Johnny

has approx. 1.3333 times more shoes than David.

Answer 3

Subtract the number that David has from the number that johnny has.

(8x - 9) - (6x + 4) = 2x - 13