7/4x+5=5/6x-4

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Solution for 7/4x+5=5/6x-4 equation:



7/4x+5=5/6x-4
We move all terms to the left:
7/4x+5-(5/6x-4)=0
Domain of the equation: 4x!=0
x!=0/4
x!=0
x∈R
Domain of the equation: 6x-4)!=0
x∈R
We get rid of parentheses
7/4x-5/6x+4+5=0
We calculate fractions
42x/24x^2+(-20x)/24x^2+4+5=0
We add all the numbers together, and all the variables
42x/24x^2+(-20x)/24x^2+9=0
We multiply all the terms by the denominator
42x+(-20x)+9*24x^2=0
Wy multiply elements
216x^2+42x+(-20x)=0
We get rid of parentheses
216x^2+42x-20x=0
We add all the numbers together, and all the variables
216x^2+22x=0
a = 216; b = 22; c = 0;
Δ = b2-4ac
Δ = 222-4·216·0
Δ = 484
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{484}=22$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(22)-22}{2*216}=\frac{-44}{432} =-11/108 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(22)+22}{2*216}=\frac{0}{432} =0 $

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