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: 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)

small typo  math  Reiny, Monday, April 6, 2009 at 8:47am
line
<< so now x6 = y4 or y = x+2 >>
should of course say
so now x6 = y8 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...
 math  PLEASE HELP ME. 1/5 of bees flew to a cherry tree, 1/3 flew to a clover ...
 evolutionary machanism  BIOLOGY  A flock of migrating birds is blown off ...
 Grammar and Composition  please check these: Capitalize the adverbs, and ...
 Writing (Writeacher and Ms. Sue)  Write a description of a scene in the story "...
 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 ...
More Related Questions