21=1/2*x(6+1)

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Solution for 21=1/2*x(6+1) equation: 



21=1/2x(6+1)

We move all terms to the left:

21-(1/2x(6+1))=0



Domain of the equation: 2x(6+1))!=0

x∈R



We add all the numbers together, and all the variables

-(1/2x7)+21=0

We get rid of parentheses

-1/2x7+21=0

We multiply all the terms by the denominator


21*2x7-1=0

Wy multiply elements

42x^7-1=0

We do not support expression: x^7

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