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2/5x-(5/3x)=4
We move all terms to the left:
2/5x-(5/3x)-(4)=0
Domain of the equation: 5x!=0
x!=0/5
x!=0
x∈R
Domain of the equation: 3x)!=0We add all the numbers together, and all the variables
x!=0/1
x!=0
x∈R
2/5x-(+5/3x)-4=0
We get rid of parentheses
2/5x-5/3x-4=0
We calculate fractions
6x/15x^2+(-25x)/15x^2-4=0
We multiply all the terms by the denominator
6x+(-25x)-4*15x^2=0
Wy multiply elements
-60x^2+6x+(-25x)=0
We get rid of parentheses
-60x^2+6x-25x=0
We add all the numbers together, and all the variables
-60x^2-19x=0
a = -60; b = -19; c = 0;
Δ = b2-4ac
Δ = -192-4·(-60)·0
Δ = 361
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{361}=19$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-19)-19}{2*-60}=\frac{0}{-120} =0 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-19)+19}{2*-60}=\frac{38}{-120} =-19/60 $
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