8t=t+21

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Solution for 8t=t+21 equation: 



8t=t+21

We move all terms to the left:

8t-(t+21)=0

We get rid of parentheses

8t-t-21=0

We add all the numbers together, and all the variables

7t-21=0

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

7t=21

t=21/7

t=3

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