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2/5(9-t)=28
We move all terms to the left:
2/5(9-t)-(28)=0
Domain of the equation: 5(9-t)!=0We add all the numbers together, and all the variables
t∈R
2/5(-1t+9)-28=0
We multiply all the terms by the denominator
-28*5(-1t+9)+2=0
Wy multiply elements
-140t(-+2=0
We use the square of the difference formula
-140t(-2=0
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