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x+x-4+2/3x=180
We move all terms to the left:
x+x-4+2/3x-(180)=0
Domain of the equation: 3x!=0We add all the numbers together, and all the variables
x!=0/3
x!=0
x∈R
2x+2/3x-184=0
We multiply all the terms by the denominator
2x*3x-184*3x+2=0
Wy multiply elements
6x^2-552x+2=0
a = 6; b = -552; c = +2;
Δ = b2-4ac
Δ = -5522-4·6·2
Δ = 304656
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{304656}=\sqrt{16*19041}=\sqrt{16}*\sqrt{19041}=4\sqrt{19041}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-552)-4\sqrt{19041}}{2*6}=\frac{552-4\sqrt{19041}}{12} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-552)+4\sqrt{19041}}{2*6}=\frac{552+4\sqrt{19041}}{12} $
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