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3.11-12.8t=18.3t
We move all terms to the left:
3.11-12.8t-(18.3t)=0
We add all the numbers together, and all the variables
-12.8t-(+18.3t)+3.11=0
We get rid of parentheses
-12.8t-18.3t+3.11=0
We add all the numbers together, and all the variables
-31.1t+3.11=0
We move all terms containing t to the left, all other terms to the right
-31.1t=-3.11
t=-3.11/-31.1
t=2.8018018018018/28.018018018018
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