Answer:
d = -4
Step-by-step explanation:
20 = -d + 16
Isolate d
20-16 = -d
4 = -d divide both sides by (-1)
-4 = d
d = -4 (variable on left side is standard)
half of 2 is 1, half of 3 is 1.5,half of 4 is 2.
The first one.
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