Question 1099441
Jason is 23 years older than his sister Joan. In 18 years, he will be twice as old as Joan. How old is each of them now?
<pre>In 18 years, Joan's age will be the difference between their ages, or 23.
Therefore, Joan's now: {{{highlight_green(matrix(1,4, 23 - 18, "=", 5, years-old))}}}, and Jason's now: {{{highlight_green(matrix(1,4, 5 + 23, "=", 28, years-old))}}}.