Question 1082820


if {{{QR}}} congruent to {{{LN}}}, than 

{{{x+5=2x-10}}}

{{{10+5=2x-x}}}

{{{x=15}}}

so, the length of segment {{{QR}}} is: 

{{{QR =x+5}}}

{{{QR =15+5}}}

{{{QR =20}}}