Answer
$\lt 10, 50 \gt $
Work Step by Step
Let us suppose that $u$ and $v$ are the two vectors:
$u=\lt -20-(-100), 70-0 \gt =\lt 80,70 \gt $
and $v=\lt 80-10, 80-60 \gt =\lt 70,20 \gt $
Thus, $u-v=\lt 80, 70 \gt - \lt 70 ,20 \gt= \lt 10, 50 \gt $