math
posted by Rosalia on .
word problem:
Q1.there were 60 birds at three treesin some moment 6 birds flew away from the first tree,8 birds flew away from the second tree, and 4 birds flew away from the third tre. then there were same number of birds at each of the three trees. How many birds were there at the second tree at the begning?
(a)24 (b)22 (c) 21 (d)20
thanks,
Rosalia

T1: x
T2: y
T3: 60xy
after flyaway:
T1: x6
T2: y8
T3: 60xy  4
so now x6 = y4 or y = x+2
and x6 = 60xy  4
2x + y = 62
sub in y=x+2
2x + (x+2) = 62
x = 20
then y=22
so T1 = 20
T2 = 22
T3 = 602022 = 18
(nice little morning workout) 
line
<< so now x6 = y4 or y = x+2 >>
should of course say
so now x6 = y8 or y = x+2