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7x=24/x+13
We move all terms to the left:
7x-(24/x+13)=0
Domain of the equation: x+13)!=0We get rid of parentheses
x∈R
7x-24/x-13=0
We multiply all the terms by the denominator
7x*x-13*x-24=0
We add all the numbers together, and all the variables
-13x+7x*x-24=0
Wy multiply elements
7x^2-13x-24=0
a = 7; b = -13; c = -24;
Δ = b2-4ac
Δ = -132-4·7·(-24)
Δ = 841
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{841}=29$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-13)-29}{2*7}=\frac{-16}{14} =-1+1/7 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-13)+29}{2*7}=\frac{42}{14} =3 $
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