Question 413494
{{{M[x] = (7 +(-3))/2}}}
{{{M[x] = 4/2}}}
{{{M[x] = 2}}}
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{{{M[y] = (-1 + 3)/2}}}
{{{M[y] = 2/2}}}
{{{M[y] = 1}}}
The midpoint is at (2,1)