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7x+6=1/2x
We move all terms to the left:
7x+6-(1/2x)=0
Domain of the equation: 2x)!=0We add all the numbers together, and all the variables
x!=0/1
x!=0
x∈R
7x-(+1/2x)+6=0
We get rid of parentheses
7x-1/2x+6=0
We multiply all the terms by the denominator
7x*2x+6*2x-1=0
Wy multiply elements
14x^2+12x-1=0
a = 14; b = 12; c = -1;
Δ = b2-4ac
Δ = 122-4·14·(-1)
Δ = 200
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{200}=\sqrt{100*2}=\sqrt{100}*\sqrt{2}=10\sqrt{2}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(12)-10\sqrt{2}}{2*14}=\frac{-12-10\sqrt{2}}{28} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(12)+10\sqrt{2}}{2*14}=\frac{-12+10\sqrt{2}}{28} $
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