ok these are the equations...

8k - 5n = 8r

3u + 2o = 189

5d + 2c = 6m

5L + 4m = 23b

3r - m = 3u

3k - 4i = 2i

3n - 3o = c

o - c = 4d

8i + 9r = 9n

10m + 7d = 3n

4d + 4e = 6b

4y - 6u = 2m

6b + 3c = 14m

now i need to find out what each variable really is...any help?