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x=5x+40/x^2+18x+80
We move all terms to the left:
x-(5x+40/x^2+18x+80)=0
Domain of the equation: x^2+18x+80)!=0We get rid of parentheses
x∈R
x-5x-40/x^2-18x-80=0
We multiply all the terms by the denominator
x*x^2-5x*x^2-18x*x^2-80*x^2-40=0
We add all the numbers together, and all the variables
-80x^2+x*x^2-5x*x^2-18x*x^2-40=0
Wy multiply elements
-80x^2+x^3-5x^3-18x^3-40=0
We do not support expression: x^3
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