Question 985644
AB=AC


{{{sqrt((7-2)^2+(k-4)^2)=sqrt((7-6)^2+(k-10)^2)}}}
{{{sqrt((5)^2+(k-4)^2)=sqrt((1)^2+(k-10)^2)}}}
{{{25+(k-4)^2=1+(k-10)^2}}}
{{{24+k^2-8k+16=k^2-20k+100}}}
{{{k^2-8k+16=k^2-20k+76}}}
{{{-8k+16=-20k+76}}}
{{{12k+16=76}}}
{{{12k=60}}}
{{{highlight(k=5)}}}