Question 1028172
The difference in their ages never changes
Let {{{ a }}} = father's age now
Let {{{ b }}} = son's age now
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(1) {{{ a = b + 23 }}}
(2) {{{ a + 2 = 2*( b + 2 ) }}}
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Substitute (1) into (2)
(2) {{{ b + 23 + 2 = 2*( b + 2 ) }}}
(2) {{{ b + 25 = 2b + 4 }}}
(2) {{{ b = 21 }}}
and
(1) {{{ a = b + 23 }}}
(1) {{{ a = 21 + 23 }}}
(1) {{{ a = 44 }}}
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The father is 44 now
The son is 21 now
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check:
(2) {{{ a + 2 = 2*( b + 2 ) }}}
(2) {{{ 44 + 2 = 2*( 21 + 2 ) }}}
(2) {{{ 46 = 2*23 }}}
(2) {{{ 46 = 46 }}}
OK