John is making a kite based on the pattern below. About how much binding does John need to cover the edges of the kite? The figure shows kite K L M N. Diagonals K M and L N intersect at point J. The length of segment L J is 3 inches. The length of segment N J is 3 inches. The length of segment K J is 15 inches. The length of segment M J is 4 inches.

about 81.2 in.
about 20.3 in.
about 60.9 in.
about 40.6 in.

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.