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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))!=0We add all the numbers together, and all the variables
x∈R
-(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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