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Math Help - to find n number of item

  1. #1
    Junior Member
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    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 ?.
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  2. #2
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    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
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  3. #3
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    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.
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  4. #4
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    Thanks very much
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