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2/7x+1/21x+2x=31
We move all terms to the left:
2/7x+1/21x+2x-(31)=0
Domain of the equation: 7x!=0
x!=0/7
x!=0
x∈R
Domain of the equation: 21x!=0We add all the numbers together, and all the variables
x!=0/21
x!=0
x∈R
2x+2/7x+1/21x-31=0
We calculate fractions
2x+42x/147x^2+7x/147x^2-31=0
We multiply all the terms by the denominator
2x*147x^2+42x+7x-31*147x^2=0
We add all the numbers together, and all the variables
49x+2x*147x^2-31*147x^2=0
Wy multiply elements
294x^3-4557x^2+49x=0
We do not support expression: x^3
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