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-0.85t-0.85t-3.9=8.25
We move all terms to the left:
-0.85t-0.85t-3.9-(8.25)=0
We add all the numbers together, and all the variables
-1.7t-12.15=0
We move all terms containing t to the left, all other terms to the right
-1.7t=12.15
t=12.15/-1.7
t=-7+0.25/1.7
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