Geometry
posted by Lilly .
9dd/5=88
c/2+11c=92
How do i solve for the variables d and c?

I find it's usually easiest to get rid of fractions.
9d  d/5 = 88
45d  d = 440
44d = 440
d = 10
check: 902 = 88
c/2 + 11c = 92
c + 22c = 184
23c = 184
c = 8
check: 4+88 = 92