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3/2x-5=7-4x
We move all terms to the left:
3/2x-5-(7-4x)=0
Domain of the equation: 2x!=0We add all the numbers together, and all the variables
x!=0/2
x!=0
x∈R
3/2x-(-4x+7)-5=0
We get rid of parentheses
3/2x+4x-7-5=0
We multiply all the terms by the denominator
4x*2x-7*2x-5*2x+3=0
Wy multiply elements
8x^2-14x-10x+3=0
We add all the numbers together, and all the variables
8x^2-24x+3=0
a = 8; b = -24; c = +3;
Δ = b2-4ac
Δ = -242-4·8·3
Δ = 480
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{480}=\sqrt{16*30}=\sqrt{16}*\sqrt{30}=4\sqrt{30}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-24)-4\sqrt{30}}{2*8}=\frac{24-4\sqrt{30}}{16} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-24)+4\sqrt{30}}{2*8}=\frac{24+4\sqrt{30}}{16} $
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