1/2*k-3=2-3/4*k

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Solution for 1/2*k-3=2-3/4*k equation:



1/2k-3=2-3/4k
We move all terms to the left:
1/2k-3-(2-3/4k)=0
Domain of the equation: 2k!=0
k!=0/2
k!=0
k∈R
Domain of the equation: 4k)!=0
k!=0/1
k!=0
k∈R
We add all the numbers together, and all the variables
1/2k-(-3/4k+2)-3=0
We get rid of parentheses
1/2k+3/4k-2-3=0
We calculate fractions
4k/8k^2+6k/8k^2-2-3=0
We add all the numbers together, and all the variables
4k/8k^2+6k/8k^2-5=0
We multiply all the terms by the denominator
4k+6k-5*8k^2=0
We add all the numbers together, and all the variables
10k-5*8k^2=0
Wy multiply elements
-40k^2+10k=0
a = -40; b = 10; c = 0;
Δ = b2-4ac
Δ = 102-4·(-40)·0
Δ = 100
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$k_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$k_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{100}=10$
$k_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(10)-10}{2*-40}=\frac{-20}{-80} =1/4 $
$k_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(10)+10}{2*-40}=\frac{0}{-80} =0 $

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