3t+9t-9t-2t=21

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Solution for 3t+9t-9t-2t=21 equation: 



3t+9t-9t-2t=21

We move all terms to the left:

3t+9t-9t-2t-(21)=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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