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8.4=-t/3.4
We move all terms to the left:
8.4-(-t/3.4)=0
We get rid of parentheses
t/3.4+8.4=0
We multiply all the terms by the denominator
t+(8.4)*3.4=0
We add all the numbers together, and all the variables
t+28.56=0
We move all terms containing t to the left, all other terms to the right
t=-28.56
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