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(2/x-7)-(5/6x-42)=16
We move all terms to the left:
(2/x-7)-(5/6x-42)-(16)=0
Domain of the equation: x-7)!=0
x∈R
Domain of the equation: 6x-42)!=0We get rid of parentheses
x∈R
2/x-5/6x-7+42-16=0
We calculate fractions
12x/6x^2+(-5x)/6x^2-7+42-16=0
We add all the numbers together, and all the variables
12x/6x^2+(-5x)/6x^2+19=0
We multiply all the terms by the denominator
12x+(-5x)+19*6x^2=0
Wy multiply elements
114x^2+12x+(-5x)=0
We get rid of parentheses
114x^2+12x-5x=0
We add all the numbers together, and all the variables
114x^2+7x=0
a = 114; b = 7; c = 0;
Δ = b2-4ac
Δ = 72-4·114·0
Δ = 49
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{49}=7$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(7)-7}{2*114}=\frac{-14}{228} =-7/114 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(7)+7}{2*114}=\frac{0}{228} =0 $
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