Question 1156251
Let {{{ a }}} = Kevin's age now
Let {{{ b }}} = Tami's age now
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(1) {{{ a - 5 = 3*( b - 5 ) }}}
(2) {{{ a = 2b }}}
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Plug (2) into (1)
(1) {{{ 2b - 5 = 3*( b - 5 ) }}}
(1) {{{ 2b - 5 = 3b - 15 }}}
(1) {{{ b = 10 }}}
and
(2) {{{ a = 2b }}}
(2) {{{ a = 2*10 }}}
(2) {{{ a = 20 }}}
Kevin is 20
Tami is 10
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check:
(1) {{{ a - 5 = 3*( b - 5 ) }}}
(1) {{{ 20 - 5 = 3*( 10 - 5 ) }}}
(1) {{{ 15 = 3*5 }}}
(1) {{{ 15 = 15 }}}
OK