Question 710711
<pre>
M = 3W
M+20 = 2(W+20)

Simplify and solve that system by substitution 
and get W = 20, M = 60.

Checking: 60 is 3 times 20.  That checks.
In 20 years he will be 80 and she will be 40. 
80 is 2 times 40. That checks.

Edwin</pre>