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3t=4.2t
We move all terms to the left:
3t-(4.2t)=0
We add all the numbers together, and all the variables
3t-(+4.2t)=0
We get rid of parentheses
3t-4.2t=0
We add all the numbers together, and all the variables
-1.2t=0
t=0/-1.2
t=0
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