The distance between the points is 2: x2 - x1 = -6 + 8. So, the midpoint would be located on a point that is half of this distance from both points.
2/2 = 1
-6 - 1 = -7-8 + 1 = -7
-7 has a distance of 1 from both -8 and -6, so this is the midpoint.
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