Posted by **Rosalia** on Monday, April 6, 2009 at 6:58am.

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

- math -
**Reiny**, Monday, April 6, 2009 at 8:39am
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)

- small typo - math -
**Reiny**, Monday, April 6, 2009 at 8:47am
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 this Question

## Related Questions

- Math Word problems - A number of birds were in a tree. Half flew away. 6 more ...
- Math Word problems - A number of birds were in a tree. Half flew away. 6 more ...
- Math - A pet shop has a total of 17 dogs and birds. Altogether there are 48 feet...
- evolutionary machanism - BIOLOGY - A flock of migrating birds is blown off ...
- math - PLEASE HELP ME. 1/5 of bees flew to a cherry tree, 1/3 flew to a clover ...
- math - ms. Dixon sees more than 199 birds but fewer than 132 birds.how many ...
- math - Ms. Dixon sees more than 119 birds but fewer than 132 birds. How many ...
- Math - Ms.Dixon sees more than 119 birds but fewer than 132 birds. How many ...
- Writing (Writeacher and Ms. Sue) - Write a description of a scene in the story "...
- Grammar and Composition - please check these: Capitalize the adverbs, and ...

More Related Questions