9t+3t=84

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Solution for 9t+3t=84 equation: 



9t+3t=84

We move all terms to the left:

9t+3t-(84)=0

We add all the numbers together, and all the variables

12t-84=0

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

12t=84

t=84/12

t=7

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