Question 1106616
Let {{{ a }}} = my age now
Let {{{ b }}} = my brother's age now
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(1) {{{ a = 2b }}}
(2) {{{ a + 2 = 4*( b - 5 ) }}}
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(2) {{{ a + 2 = 4b - 20 }}}
(2) {{{ a = 4b - 22 }}}
Plug (1) into (2)
(2) {{{ 2b = 4b - 22 }}}
(2) {{{ 2b = 22 }}}
(2) {{{ b = 11 }}}
and
(1) {{{ a = 2b }}}
(1) {{{ a = 2*11 }}}
(1) {{{ a = 22 }}}
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I am 22 today
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check:
(2) {{{ a + 2 = 4*( b - 5 ) }}}
(2) {{{ 22 + 2 = 4*( 11 - 5 ) }}}
(2) {{{ 24 = 4*6 }}}
(2) {{{ 24 = 24 }}}
OK