Question 1123831
{{{system((13-c)=d/(38/60),(13+c)=d/(14/60))}}}


Question is to find c.


{{{(38/60)(13-c)=(14/60)(13+c)}}}


{{{(19/30)(13-c)=(7/30)(13+c)}}}

{{{19(13-c)=7(13+c)}}}

{{{19*13-19c=7*13+7c}}}

{{{19*13-7*13=7c+19c}}}

{{{12*13=26c}}}

{{{6*2*13=2*13*c}}}

{{{highlight(c=6)}}}