Question 1169872

Suzy is 5 years younger than her brother Joey.  The sum of their ages is 25.  How old is Suzy?
<pre>Let Suzy's age be S
Then Joey's is: S + 5
We then get: S + S + 5 = 25
2S = 20
Suzy's age, or {{{highlight_green(matrix(1,5, S, "=", 20/2, "=", 10))}}}