1/5x+1/3x=24

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Solution for 1/5x+1/3x=24 equation: 



1/5x+1/3x=24

We move all terms to the left:

1/5x+1/3x-(24)=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 calculate fractions


3x/15x^2+5x/15x^2-24=0

We multiply all the terms by the denominator


3x+5x-24*15x^2=0

We add all the numbers together, and all the variables

8x-24*15x^2=0

Wy multiply elements

-360x^2+8x=0

a = -360; b = 8; c = 0;
Δ = b2-4ac
Δ = 82-4·(-360)·0
Δ = 64
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{64}=8$


$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(8)-8}{2*-360}=\frac{-16}{-720}
=1/45
$


$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(8)+8}{2*-360}=\frac{0}{-720}
=0
$

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