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9/10x-21=9/10(x-28)
We move all terms to the left:
9/10x-21-(9/10(x-28))=0
Domain of the equation: 10x!=0
x!=0/10
x!=0
x∈R
Domain of the equation: 10(x-28))!=0We calculate fractions
x∈R
(90xx/(100x^2x+(-(9*10x)/(100x^2x-21=0
We can not solve this equation
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