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-12t+12+9t=5t-3
We move all terms to the left:
-12t+12+9t-(5t-3)=0
We add all the numbers together, and all the variables
-3t-(5t-3)+12=0
We get rid of parentheses
-3t-5t+3+12=0
We add all the numbers together, and all the variables
-8t+15=0
We move all terms containing t to the left, all other terms to the right
-8t=-15
t=-15/-8
t=1+7/8
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