Assuming the number of chickens is 'x'

Assuming the number of goats is 'y'

x + y = 104

2x + 4y = 246 ( The number of legs time the number of animals)

(2x + 4y) - 2(x + y) = 2y

246 - 2(104) = 246 -208 = 38 (38 is 2y) <-- ( Substituting algebraic terms for numbers)

38/2 = 19

y = 19

104 - 19 = 85

x = 85

So, the number of chickens is

__85__and the number of goats is

__19__.

Done by Tobias Tang (22) 27/9/11

Simple, easy to understand

ReplyDeleteDetailed solution, easy to understand

ReplyDeleteVery simeple too understand,very straightforward

ReplyDeletegood but can be improved:

ReplyDelete1. you can say that (2x+4y)-2(x+y)=246-2(104) and then solve this equation because if you do it separately, some people might not be able to visualize that the two are the same.

2. if possible, you can say what is the result of every equation.

i agree with "someone called abiyyu". it's rather simple to understand visually

ReplyDelete