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-11/6x-1/7x=-83/56
We move all terms to the left:
-11/6x-1/7x-(-83/56)=0
Domain of the equation: 6x!=0
x!=0/6
x!=0
x∈R
Domain of the equation: 7x!=0We get rid of parentheses
x!=0/7
x!=0
x∈R
-11/6x-1/7x+83/56=0
We calculate fractions
24402x^2/11760x^2+(-21560x)/11760x^2+(-1680x)/11760x^2=0
We multiply all the terms by the denominator
24402x^2+(-21560x)+(-1680x)=0
We get rid of parentheses
24402x^2-21560x-1680x=0
We add all the numbers together, and all the variables
24402x^2-23240x=0
a = 24402; b = -23240; c = 0;
Δ = b2-4ac
Δ = -232402-4·24402·0
Δ = 540097600
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{540097600}=23240$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-23240)-23240}{2*24402}=\frac{0}{48804} =0 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-23240)+23240}{2*24402}=\frac{46480}{48804} =20/21 $
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