Question 1088719
Let {{{ a }}} = the father's age now
Let {{{ b }}} = the son's age now
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(1) {{{ a = 4b }}}
(2) {{{ ( b + 3 ) = ( a + 3 ) - 27 }}}
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(2) {{{ b + 3 = a - 24 }}}
(2) {{{ a - b = 27 }}}
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Plug (1) into (2)
(2) {{{ 4b - b = 27 }}}
(2) {{{ 3b = 27 }}}
(2) {{{ b = 9 }}}
and
(1) {{{ a = 4b }}}
(1) {{{ a = 4*9 }}}
(1) {{{ a = 36 }}}
The father is 36
The son is 9
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check:
(2) {{{ ( b + 3 ) = ( a + 3 ) - 27 }}}
(2) {{{ ( 9 + 3 ) = ( 36 + 3 ) - 27 }}}
(2) {{{ 12 = 39 - 27 }}}
(2) {{{ 12 = 12 }}}
OK