math
posted by Lily on .
The local fish market is having a sale on whole fish. the prices are as follows:
You can buy an albacore and a barracuda for$21
You can buy a barracuda and a carp for $32
You can buy a carp and a dogfish for $32
You can buy a dogfish and an eel for $37
You can buy an eel and flounder for $31
You can buy a flounder and a gar for $25
You can buy gar and an albacore for $26
Determine the cost of each individual fish

a + b = 21
b + c = 32 or
b = 32  c so
a + 32  c = 21
c + d = 32 so
c = 32  d and
a + 32  (32  d) = 21 etc.