Question 1107105
Let {{{ a }}} = Nancy's age now
Let {{{ b }}} = Stan's age now
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(1) {{{ a = b - 5 }}}
(2) {{{ a - 1 = (1/2)*( b - 1 ) }}}
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Substitute (1) into (2)
(2) {{{ b - 5 - 1 = (1/2)*( b - 1 ) }}}
(2) {{{ b - 6 = (1/2)*( b - 1 ) }}}
(2) {{{ 2*( b - 6 ) = b - 1 }}}
(2) {{{ 2b - 12 = b - 1 }}}
(2) {{{ b = 11 }}}
and
(1) {{{ a = b - 5 }}}
(1) {{{ a = 11 - 5 }}}
(1) {{{ a = 6 }}}
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Nancy is 6
Stan is 11