3t+12=21

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Solution for 3t+12=21 equation: 



3t+12=21

We move all terms to the left:

3t+12-(21)=0

We add all the numbers together, and all the variables

3t-9=0

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

3t=9

t=9/3

t=3

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