Sunday

November 23, 2014

November 23, 2014

Posted by **MJ** on Monday, February 6, 2012 at 7:45am.

- algebra -
**Reiny**, Monday, February 6, 2012 at 9:23amnumber of pens for Bob --- x

number of pens for Jane --- y

case1: Bob gives 3 pens to Jane

Bob has x-3

Jane has y+3

so x-3 = y+3

x-y = 6

case2: Jane gives 3 pens

Bob has x+3

Jane has y-3

x+3 = 3(y-3)

x+3 = 3y - 9

x - 3y = -12

subtract the two equations

2y = 18

y = 9

sub into 1st equation:

x-9 = 6

x = 15

Bob now has 15 and Jane has 9

after 1st transfer, bob has 12 and Jane has 12, good!

afer 2nd transfer, Bob has 18 and Jane has 6

does he have 3 times what she has? YES!

all is good!

**Answer this Question**

**Related Questions**

Math - Jane has a set of green, black and yellow pens. The green pens make up 1/...

math - a number of teachers were to receive 6 pens each ,but needed 4 more pens ...

algebra - A pet boarding facility wants to build two adjacent pens of equal size...

advanced algebra - Jennifer figures that she uses 2 pens per month. She started ...

algebra - A college bookstore ordered six boxes of red pens. The store sold 37 ...

12th grade - A farmer has 100 yards of fencing to form two identical rectangular...

pre algebra - A college bookstore ordered 6 boxes of red pens. The store sold 32...

math - A salesperson bought a caase of pens.On Monday, he sold 1/2 of the pens....

English - I am still confused about the use of 'a couple of' For example, if a ...

math - A college bookstore ordered six boxes of red pens. The store sold 32 red ...