Question 1210503
<pre>
                 IF      THEN IF

Tom       t      t-30     t-30+50=t+20

Maria     m      m+30     m+30-50=m-20
</pre>
Following the description given,
{{{system(t-30=m+30,t+20=2(m-20))}}}


Solve for original t and m money cents quantities

{{{system(t-m=60,t+20=2m-40)}}}


{{{system(t-m=60,t-2m=-60)}}}


{{{system(t-m=60,-t+2m=60)}}}

ADD those.

{{{m=120}}} and then {{{t=180}}}


They each then have AFTER the second transfer
Tom, 200
Maria, 100