Answer:
v=1/4ht-c/t-r/2t
Explanation:
r=ht^2/2-2vt-2c
2vt=ht^2/2-2c-r
2vt=(1/2)ht^2-2c-r
vt=[(1/2)/2]ht^2-2/2c-r/2
vt=1/4ht^2-c-r/2
v=(1/4ht^2)/t-c/t-(r/2)/t
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