12=39-9.8t

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Solution for 12=39-9.8t equation: 



12=39-9.8t

We move all terms to the left:

12-(39-9.8t)=0

We add all the numbers together, and all the variables

-(-9.8t+39)+12=0

We get rid of parentheses

9.8t-39+12=0

We add all the numbers together, and all the variables

9.8t-27=0

We move all terms containing t to the left, all other terms to the right

9.8t=27

t=27/9.8

t=2+5.2857142857143/7

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