6/x-5/2x=28

Solution for 6/x-5/2x=28 equation:

6/x-5/2x=28

We move all terms to the left:

6/x-5/2x-(28)=0


Domain of the equation: x!=0

x∈R



Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R


We calculate fractions


12x/2x^2+(-5x)/2x^2-28=0

We multiply all the terms by the denominator


12x+(-5x)-28*2x^2=0

Wy multiply elements

-56x^2+12x+(-5x)=0

We get rid of parentheses

-56x^2+12x-5x=0

We add all the numbers together, and all the variables

-56x^2+7x=0

a = -56; b = 7; c = 0;
Δ = b2-4ac
Δ = 72-4·(-56)·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*-56}=\frac{-14}{-112}
=1/8
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(7)+7}{2*-56}=\frac{0}{-112}
=0
$