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 ?.

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- Oct 3rd 2010, 09:56 PMalanpaulto 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 PMdownthesun01
$\displaystyle s=sam$, $\displaystyle j=joe$

$\displaystyle s=j+6$

$\displaystyle s+j=66$

$\displaystyle (j+6)+j=66$

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

I think you can figure out the rest from here. I probably gave you too much help - Oct 4th 2010, 02:30 AMHallsofIvy
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 PMalanpaul
Thanks very much