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x=22/((40-2x)-4x)
We move all terms to the left:
x-(22/((40-2x)-4x))=0
Domain of the equation: ((40-2x)-4x))!=0We add all the numbers together, and all the variables
x∈R
x-(22/((-2x+40)-4x))=0
We multiply all the terms by the denominator
x*((-2x+40)-4x))-(22=0
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