3/5x-1/3x=-4

Solution for 3/5x-1/3x=-4 equation:

3/5x-1/3x=-4

We move all terms to the left:

3/5x-1/3x-(-4)=0


Domain of the equation: 5x!=0

x!=0/5

x!=0

x∈R



Domain of the equation: 3x!=0

x!=0/3

x!=0

x∈R


We add all the numbers together, and all the variables

3/5x-1/3x+4=0

We calculate fractions


9x/15x^2+(-5x)/15x^2+4=0

We multiply all the terms by the denominator


9x+(-5x)+4*15x^2=0

Wy multiply elements

60x^2+9x+(-5x)=0

We get rid of parentheses

60x^2+9x-5x=0

We add all the numbers together, and all the variables

60x^2+4x=0

a = 60; b = 4; c = 0;
Δ = b2-4ac
Δ = 42-4·60·0
Δ = 16
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{16}=4$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-4}{2*60}=\frac{-8}{120}
=-1/15
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+4}{2*60}=\frac{0}{120}
=0
$