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2.9=t-0.39
We move all terms to the left:
2.9-(t-0.39)=0
We get rid of parentheses
-t+0.39+2.9=0
We add all the numbers together, and all the variables
-1t+3.29=0
We move all terms containing t to the left, all other terms to the right
-t=-3.29
t=-3.29/-1
t=3+0.29/1
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