# to find n number of item

• Oct 3rd 2010, 09:56 PM
alanpaul
to find n number of item
Sam has 6 more marbles than joe .Together they have a total of 66 marbles. How many marbles has Sam?

Pleasee anybody can give a common formula to find the answer 36 ?.
• Oct 3rd 2010, 10:21 PM
downthesun01
$s=sam$, $j=joe$

$s=j+6$

$s+j=66$

$(j+6)+j=66$

$2j+6=66....$

I think you can figure out the rest from here. I probably gave you too much help
• Oct 4th 2010, 02:30 AM
HallsofIvy
Another way to look at it: 1/2 of 66 is 33 so if they had exactlly the same number, each would have 33. Also 1/2 of 6 is 3. If Joe now gave 3 of his 33 marbles to Sam, he would have 33- 3= 30 marbles and Sam would have 33+ 3= 36 marbles, so that Sam would have 6 more than Joe.
• Oct 4th 2010, 09:50 PM
alanpaul
Thanks very much