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2x+12=3/4x+27
We move all terms to the left:
2x+12-(3/4x+27)=0
Domain of the equation: 4x+27)!=0We get rid of parentheses
x∈R
2x-3/4x-27+12=0
We multiply all the terms by the denominator
2x*4x-27*4x+12*4x-3=0
Wy multiply elements
8x^2-108x+48x-3=0
We add all the numbers together, and all the variables
8x^2-60x-3=0
a = 8; b = -60; c = -3;
Δ = b2-4ac
Δ = -602-4·8·(-3)
Δ = 3696
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{3696}=\sqrt{16*231}=\sqrt{16}*\sqrt{231}=4\sqrt{231}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-60)-4\sqrt{231}}{2*8}=\frac{60-4\sqrt{231}}{16} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-60)+4\sqrt{231}}{2*8}=\frac{60+4\sqrt{231}}{16} $
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