Problema Solution
a group of ducks and goats have 99 heads and legs among them. There are twice as many ducks as goats. how many are there of each.
Answer provided by our tutors
let
the number of goats be: x
the number of ducks will be: 2x (twice as many ducks as goats)
ducks and goats have 99 heads and legs among them
x + 2x + 4x + 2*2x = 99
by solving we find
x = 9 goats
2*9 = 18 ducks
there are 9 goats and 18 ducks.