21(21)=7x(28x)

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Solution for 21(21)=7x(28x) equation: 



21(21)=7x(28x)

We move all terms to the left:

21(21)-(7x(28x))=0

determiningTheFunctionDomain
-7x28x+2121=0

We move all terms containing x to the left, all other terms to the right

-7x28x=-2121

x=-2121/1

x=-2121

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