Question 1046004
Let {{{ z }}} = Zeina's age now
Let {{{ w }}} = Wadiha's age now
-----------------------------
(1) {{{ z = w + 4 }}}
(2) {{{ z - 6 = 2*( w - 6 ) }}}
-----------------------------
Substitute (1) into (2)
(2) {{{ w + 4 - 6 = 2*( w - 6 ) }}}
(2) {{{ w - 2 = 2w - 12 }}}
(2) {{{ w = 10 }}}
and
(1) {{{ z = 10 + 4 }}}
(1) {{{ z = 14 }}}
Zeina's age now is 14
Wadiha's age now is 10
------------------------
check:
(1) {{{ z = w + 4 }}}
(1) {{{ 14 = 10 + 4 }}}
(1) {{{ 14 = 14 }}}
and
(2) {{{ z - 6 = 2*( w - 6 ) }}}
(2) {{{ 14 - 6 = 2*( 10 - 6 ) }}}
(2) {{{ 8 = 2*4 }}}
(2) {{{ 8 = 8 }}}
OK