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3/7t+9=0
Domain of the equation: 7t!=0We multiply all the terms by the denominator
t!=0/7
t!=0
t∈R
9*7t+3=0
Wy multiply elements
63t+3=0
We move all terms containing t to the left, all other terms to the right
63t=-3
t=-3/63
t=-1/21
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