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7/8x-3=15/16x+2
We move all terms to the left:
7/8x-3-(15/16x+2)=0
Domain of the equation: 8x!=0
x!=0/8
x!=0
x∈R
Domain of the equation: 16x+2)!=0We get rid of parentheses
x∈R
7/8x-15/16x-2-3=0
We calculate fractions
112x/128x^2+(-120x)/128x^2-2-3=0
We add all the numbers together, and all the variables
112x/128x^2+(-120x)/128x^2-5=0
We multiply all the terms by the denominator
112x+(-120x)-5*128x^2=0
Wy multiply elements
-640x^2+112x+(-120x)=0
We get rid of parentheses
-640x^2+112x-120x=0
We add all the numbers together, and all the variables
-640x^2-8x=0
a = -640; b = -8; c = 0;
Δ = b2-4ac
Δ = -82-4·(-640)·0
Δ = 64
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{64}=8$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-8)-8}{2*-640}=\frac{0}{-1280} =0 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-8)+8}{2*-640}=\frac{16}{-1280} =-1/80 $
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