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(4/3x)+4x=18
We move all terms to the left:
(4/3x)+4x-(18)=0
Domain of the equation: 3x)!=0We add all the numbers together, and all the variables
x!=0/1
x!=0
x∈R
(+4/3x)+4x-18=0
We add all the numbers together, and all the variables
4x+(+4/3x)-18=0
We get rid of parentheses
4x+4/3x-18=0
We multiply all the terms by the denominator
4x*3x-18*3x+4=0
Wy multiply elements
12x^2-54x+4=0
a = 12; b = -54; c = +4;
Δ = b2-4ac
Δ = -542-4·12·4
Δ = 2724
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{2724}=\sqrt{4*681}=\sqrt{4}*\sqrt{681}=2\sqrt{681}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-54)-2\sqrt{681}}{2*12}=\frac{54-2\sqrt{681}}{24} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-54)+2\sqrt{681}}{2*12}=\frac{54+2\sqrt{681}}{24} $
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