Question 493825
Let's write some equations!
The total number of seats is {{{A+B=449}}}
and {{{A=B+139}}} since A has 139 more seats than B

Now we can solve them.
inserting {{{A=B+139}}} into the first eaquation leads to
{{{(B+139)+B=449}}}
so {{{2*B=449-139=310}}}
therefore {{{B=310/2=155}}}

and so {{{A=B+139=155+139=294}}}

merv