Question 1153388
The difference in Ron's age and Joan's age is 9 years.<pre> 
R - J = 9</pre>
In 3 years, Ron will be twice as old as Joan.<pre> 
R + 3 = 2(J + 3)

{{{system(R-J=9, R+3=2(J+3))}}}

Simplify and solve the system of equations by substitution.</pre>
How old is each now?<pre>  

You find out by solving the above.

Edwin</pre>