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7t+1.8=3.1
We move all terms to the left:
7t+1.8-(3.1)=0
We add all the numbers together, and all the variables
7t-1.3=0
We move all terms containing t to the left, all other terms to the right
7t=1.3
t=1.3/7
t=1/5.38461538462
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