1/3x+4=2/5x

Solution for 1/3x+4=2/5x equation:

1/3x+4=2/5x

We move all terms to the left:

1/3x+4-(2/5x)=0


Domain of the equation: 3x!=0

x!=0/3

x!=0

x∈R



Domain of the equation: 5x)!=0

x!=0/1

x!=0

x∈R


We add all the numbers together, and all the variables

1/3x-(+2/5x)+4=0

We get rid of parentheses

1/3x-2/5x+4=0

We calculate fractions


5x/15x^2+(-6x)/15x^2+4=0

We multiply all the terms by the denominator


5x+(-6x)+4*15x^2=0

Wy multiply elements

60x^2+5x+(-6x)=0

We get rid of parentheses

60x^2+5x-6x=0

We add all the numbers together, and all the variables

60x^2-1x=0

a = 60; b = -1; c = 0;
Δ = b2-4ac
Δ = -12-4·60·0
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*60}=\frac{0}{120}
=0
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1)+1}{2*60}=\frac{2}{120}
=1/60
$