Answer:
20.9-26.2 = -5.3 to the left (or 5.3 to the right)
-5
Explanation:
Let 0 be the reference position (red post)
Positive direction: right
Negative direction: left
26.2 is approximately 26
20.9 is approximately 21
0 + 26 - 21 = +5
5 units towards the right
Or,
-5 units towards the left
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