21+5t=8t

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Solution for 21+5t=8t equation: 



21+5t=8t

We move all terms to the left:

21+5t-(8t)=0

We add all the numbers together, and all the variables

-3t+21=0

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

-3t=-21

t=-21/-3

t=+7

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