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(t+3t+4)/(7-t)=12
We move all terms to the left:
(t+3t+4)/(7-t)-(12)=0
Domain of the equation: (7-t)!=0We add all the numbers together, and all the variables
We move all terms containing t to the left, all other terms to the right
-t!=-7
t!=-7/-1
t!=+7
t∈R
(4t+4)/(-1t+7)-12=0
We multiply all the terms by the denominator
(4t+4)-12*(-1t+7)=0
We multiply parentheses
(4t+4)+12t-84=0
We get rid of parentheses
4t+12t+4-84=0
We add all the numbers together, and all the variables
16t-80=0
We move all terms containing t to the left, all other terms to the right
16t=80
t=80/16
t=5
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