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13.9+3.2t=28.3
We move all terms to the left:
13.9+3.2t-(28.3)=0
We add all the numbers together, and all the variables
3.2t-14.4=0
We move all terms containing t to the left, all other terms to the right
3.2t=14.4
t=14.4/3.2
t=4+1/2
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