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13/5x+18=24/7x-36
We move all terms to the left:
13/5x+18-(24/7x-36)=0
Domain of the equation: 5x!=0
x!=0/5
x!=0
x∈R
Domain of the equation: 7x-36)!=0We get rid of parentheses
x∈R
13/5x-24/7x+36+18=0
We calculate fractions
91x/35x^2+(-120x)/35x^2+36+18=0
We add all the numbers together, and all the variables
91x/35x^2+(-120x)/35x^2+54=0
We multiply all the terms by the denominator
91x+(-120x)+54*35x^2=0
Wy multiply elements
1890x^2+91x+(-120x)=0
We get rid of parentheses
1890x^2+91x-120x=0
We add all the numbers together, and all the variables
1890x^2-29x=0
a = 1890; b = -29; c = 0;
Δ = b2-4ac
Δ = -292-4·1890·0
Δ = 841
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{841}=29$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-29)-29}{2*1890}=\frac{0}{3780} =0 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-29)+29}{2*1890}=\frac{58}{3780} =29/1890 $
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