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25/t+21=15
We move all terms to the left:
25/t+21-(15)=0
Domain of the equation: t!=0We add all the numbers together, and all the variables
t∈R
25/t+6=0
We multiply all the terms by the denominator
6*t+25=0
We add all the numbers together, and all the variables
6t+25=0
We move all terms containing t to the left, all other terms to the right
6t=-25
t=-25/6
t=-4+1/6
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