Question 775913
Let {{{ n }}} = the number I have
Let {{{ m }}} = the number you have
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(1) {{{ n + 1 = m - 1 }}}
(2) {{{ 2*( n - 1 ) = m + 1 }}}
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(1) {{{ m - n = 2 }}}
and
(2) {{{ 2n - 2 = m + 1 }}}
(2) {{{ -m + 2n = 3 }}}
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Add (1) and (2)
(1) {{{ m - n = 2 }}}
(2) {{{ -m + 2n = 3 }}}
{{{ n = 5 }}}
and
(1) {{{ m - n = 2 }}}
(1) {{{ m - 5 = 2 }}}
(1) {{{ m = 7 }}}
I have 5 and you have 7
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check:
If you give me 1, we both have 6
If I give you 1, you have 8 and I have 
4, which is half of 8
OK