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(3/4)*x-4=8
We move all terms to the left:
(3/4)*x-4-(8)=0
Domain of the equation: 4)*x!=0We add all the numbers together, and all the variables
x!=0/1
x!=0
x∈R
(+3/4)*x-4-8=0
We add all the numbers together, and all the variables
(+3/4)*x-12=0
We multiply parentheses
3x^2-12=0
a = 3; b = 0; c = -12;
Δ = b2-4ac
Δ = 02-4·3·(-12)
Δ = 144
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{144}=12$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-12}{2*3}=\frac{-12}{6} =-2 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+12}{2*3}=\frac{12}{6} =2 $
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