MATHS PROBLEM: 10 points ?

Question

could someone please temm me how to work this problem out and give me the answer .. thanks :)

John is setting a new farm up. He buys EXACTLY 272 animals, theres a mix of horse, cows and ducks. Horse cost $80 Cows cost $135 Ducks cost $3.

If John spends $12 869 in total, how many of each kind did he buy??

Horse ___?___

Cow ____?____

Duck ___?____

first correct answer will get the 10 points . THANK YOU :P

Answer 1

makefire... is wrong the fool is looking on the wrong side of the ='s sign

Answer 2

Let

H = number of horses

C = number of cows

D = number of ducks

H + C + D = 272 ==> Eq. 1

80H = Cost of the horses

135C = cost of cows

3D = cost of ducks

80H + 135C + 3D = 12 869 ==> Eq. 2

=====================

One more detail is missing.

A third equation must exist.

Check your problem carefully.

Answer 3

Unfortunately that is not a correct answer as

89+10+18 does not equal 272.

Answer 4

There are a number of possible solutions, here's one:

89 Cows = 12,015

10 Horses = 800

18 Ducks = 54

                =12,869