Question 1090429
<pre><b>

{{{system(

matrix(1,7,

(matrix(2,1,
"Pamela's",age)),
"",
""="",
"",
(matrix(2,1,
"Jiri's",age)),
""+"",
6),

"",
matrix(1,7,

(matrix(2,1,
"Pamela's",age)),
""+"",
(matrix(2,1,
"Jiri's",age)),
"",
""="",
"",
46)

)}}}

{{{system(P=J+6,P+J=46)}}}

Use the first equation to substitute J+6 for P in the
second equation:

{{{(J+6)+J=56}}}
{{{J+6+J=46}}}
{{{2J+6=46}}}
{{{2J=40}}}
{{{J=20}}}

Substitute in {{{P=J+6}}}

{{{P=J+6=20+6=26}}}

So Jiri is 20 years old and Pamela is 26 years old.

Edwin</pre>