21=3x*(5+2)

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Solution for 21=3x*(5+2) equation: 



21=3x(5+2)

We move all terms to the left:

21-(3x(5+2))=0

We add all the numbers together, and all the variables

-(3x7)+21=0

We add all the numbers together, and all the variables

-3x^7+21=0

We do not support expression: x^7

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