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1320.80=28.8t+644
We move all terms to the left:
1320.80-(28.8t+644)=0
We add all the numbers together, and all the variables
-(28.8t+644)+1320.8=0
We get rid of parentheses
-28.8t-644+1320.8=0
We add all the numbers together, and all the variables
-28.8t+676.8=0
We move all terms containing t to the left, all other terms to the right
-28.8t=-676.8
t=-676.8/-28.8
t=23+1/2
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