8t-9=21+5t

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Solution for 8t-9=21+5t equation: 



8t-9=21+5t

We move all terms to the left:

8t-9-(21+5t)=0

We add all the numbers together, and all the variables

8t-(5t+21)-9=0

We get rid of parentheses

8t-5t-21-9=0

We add all the numbers together, and all the variables

3t-30=0

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

3t=30

t=30/3

t=10

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