3/x-4=5/2x

Solution for 3/x-4=5/2x equation:

3/x-4=5/2x

We move all terms to the left:

3/x-4-(5/2x)=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

3/x-(+5/2x)-4=0

We get rid of parentheses

3/x-5/2x-4=0

We calculate fractions


6x/2x^2+(-5x)/2x^2-4=0

We multiply all the terms by the denominator


6x+(-5x)-4*2x^2=0

Wy multiply elements

-8x^2+6x+(-5x)=0

We get rid of parentheses

-8x^2+6x-5x=0

We add all the numbers together, and all the variables

-8x^2+x=0

a = -8; b = 1; c = 0;
Δ = b2-4ac
Δ = 12-4·(-8)·0
Δ = 1
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1}=1$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-1}{2*-8}=\frac{-2}{-16}
=1/8
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+1}{2*-8}=\frac{0}{-16}
=0
$