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2x+13=(1/3x)-7
We move all terms to the left:
2x+13-((1/3x)-7)=0
Domain of the equation: 3x)-7)!=0We add all the numbers together, and all the variables
x!=0/1
x!=0
x∈R
2x-((+1/3x)-7)+13=0
We multiply all the terms by the denominator
2x*3x)-7)-((+13*3x)-7)+1=0
Wy multiply elements
6x^2+39x=0
a = 6; b = 39; c = 0;
Δ = b2-4ac
Δ = 392-4·6·0
Δ = 1521
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{1521}=39$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(39)-39}{2*6}=\frac{-78}{12} =-6+1/2 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(39)+39}{2*6}=\frac{0}{12} =0 $
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