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2/9x+13=11-3/8x
We move all terms to the left:
2/9x+13-(11-3/8x)=0
Domain of the equation: 9x!=0
x!=0/9
x!=0
x∈R
Domain of the equation: 8x)!=0We add all the numbers together, and all the variables
x!=0/1
x!=0
x∈R
2/9x-(-3/8x+11)+13=0
We get rid of parentheses
2/9x+3/8x-11+13=0
We calculate fractions
16x/72x^2+27x/72x^2-11+13=0
We add all the numbers together, and all the variables
16x/72x^2+27x/72x^2+2=0
We multiply all the terms by the denominator
16x+27x+2*72x^2=0
We add all the numbers together, and all the variables
43x+2*72x^2=0
Wy multiply elements
144x^2+43x=0
a = 144; b = 43; c = 0;
Δ = b2-4ac
Δ = 432-4·144·0
Δ = 1849
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{1849}=43$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(43)-43}{2*144}=\frac{-86}{288} =-43/144 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(43)+43}{2*144}=\frac{0}{288} =0 $
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