word problem:

Question

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

Answer 1

T1: x
T2: y
T3: 60-x-y

after fly-away:
T1: x-6
T2: y-8
T3: 60-x-y - 4

so now x-6 = y-4 or y = x+2
and x-6 = 60-x-y - 4
2x + y = 62
sub in y=x+2
2x + (x+2) = 62
x = 20
then y=22

so T1 = 20
T2 = 22
T3 = 60-20-22 = 18

(nice little morning work-out)

Answer 2

line
<< so now x-6 = y-4 or y = x+2 >>

should of course say

so now x-6 = y-8 or y = x+2

Answer 3

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Answer 4

cool

Answer 5

wrong

Answer 6

I apologize, I didn't understand your previous message. Can you please provide more context or clarify your message?