2t-9=12+t

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Solution for 2t-9=12+t equation: 



2t-9=12+t

We move all terms to the left:

2t-9-(12+t)=0

We add all the numbers together, and all the variables

2t-(t+12)-9=0

We get rid of parentheses

2t-t-12-9=0

We add all the numbers together, and all the variables

t-21=0

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

t=21

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