Question 736463
Let {{{ x }}} = Son's age when Father is 3 times his age
Let {{{ y }}} = the Father's age then
------------------
The difference in their ages will always be {{{ 30 }}} yrs, so
(1) {{{ y - x = 30 }}}
I am also given:
(2) {{{ y = 3x }}}
-------------
I can substitute (2) into (1)
(1) {{{ 3x -x = 30 }}}
(1) {{{ 2x = 30 }}}
(1) {{{ x = 15 }}}
and
(2) {{{ y = 3*15 }}}
(2) {{{ y = 45 }}}
---------------
The son is 15 and the father is 45