8/x=5+1/2x

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Solution for 8/x=5+1/2x equation:



8/x=5+1/2x
We move all terms to the left:
8/x-(5+1/2x)=0
Domain of the equation: x!=0
x∈R
Domain of the equation: 2x)!=0
x!=0/1
x!=0
x∈R
We add all the numbers together, and all the variables
8/x-(1/2x+5)=0
We get rid of parentheses
8/x-1/2x-5=0
We calculate fractions
16x/2x^2+(-x)/2x^2-5=0
We add all the numbers together, and all the variables
16x/2x^2+(-1x)/2x^2-5=0
We multiply all the terms by the denominator
16x+(-1x)-5*2x^2=0
Wy multiply elements
-10x^2+16x+(-1x)=0
We get rid of parentheses
-10x^2+16x-1x=0
We add all the numbers together, and all the variables
-10x^2+15x=0
a = -10; b = 15; c = 0;
Δ = b2-4ac
Δ = 152-4·(-10)·0
Δ = 225
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{225}=15$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(15)-15}{2*-10}=\frac{-30}{-20} =1+1/2 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(15)+15}{2*-10}=\frac{0}{-20} =0 $

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