Question 1054720
{{{A/(2A+5)}}} is the original fraction.
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{{{(A+8)/(2A+5+8)=10/19}}}
{{{(A+8)/(2A+13)=10/19}}}
{{{19(A+8)=10(2A+13)}}}
{{{19A+152=20A+130}}}
{{{-A=-12}}}
{{{A=12}}}
So the original fraction is,
{{{12/(2(12)+15)=12/39}}}