Question 1058653
Let {{{ j }}} = Jaime's age now
Let {{{ a }}} = Amy's age now
----------------------------
(1) {{{ j = a + 5 }}}
(2) {{{ j + a = 19 }}}
-----------------------
Substitute (1) into (2)
(2) {{{ a + 5 + a = 19 }}}
(2) {{{ 2a + 5 = 19 }}}
(2) {{{ 2a = 14 }}}
(2) {{{ a = 7 }}}
and
(1) {{{ j = a + 5 }}}
(1) {{{ j = 7 + 5 }}}
(1) {{{ j = 12 }}}
Jaime is 12
--------------------
check:
(2) {{{ j + a = 19 }}}
(2) {{{ 12 + 7 = 19 }}}
(2) {{{ 19 = 19 }}}
OK