Question 1051147
{{{B=2*A}}}
and
{{{(A+20)/(B+20)=9/13}}}
{{{9(B+20)=13(A+20)}}}
{{{9B+180=13A+260}}}
{{{9B-13A=80}}}
Substituting,
{{{9(2A)-13A=80}}}
{{{18A-13A=80}}}
{{{5A=80}}}
{{{A=16}}}
Then,
{{{B=2*16}}}
{{{B=32}}}