Question 573687
Let {{{ h }}} = Harry's age now
Let {{{ c }}} = Charlie's age now
given:
(1) {{{ h = 6c }}}
(2) {{{ h + 6 = 4*( c + 6 ) }}}
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Substitute (1) into (2)
(2) {{{ 6c + 6 = 4c + 24 }}}
(2) {{{ 2c = 24 - 6 }}}
(2) {{{ 2c = 18 }}}
(2) {{{ c = 9 }}}
and
(1) {{{ h = 6c }}}
(1) {{{ h = 6*9 }}}
(1) {{{ h =54 }}}
Harry is 54 and Charlie is 9
check:
(2) {{{ h + 6 = 4*( c + 6 ) }}}
(2) {{{ 54 + 6 = 4*( 9 + 6 ) }}}
(2) {{{ 60 = 4*15 }}}
(2) {{{ 60 = 60 }}}
OK