8-9t=21t-12

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Solution for 8-9t=21t-12 equation: 



8-9t=21t-12

We move all terms to the left:

8-9t-(21t-12)=0

We get rid of parentheses

-9t-21t+12+8=0

We add all the numbers together, and all the variables

-30t+20=0

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

-30t=-20

t=-20/-30

t=2/3

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