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5=4t+0.5*2t*t
We move all terms to the left:
5-(4t+0.5*2t*t)=0
We add all the numbers together, and all the variables
-(+4t+0.5*2t*t)+5=0
We get rid of parentheses
-4t-0.5*2t*t+5=0
We move all terms containing t to the left, all other terms to the right
-4t-0.5*2t*t=-5
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