1/2n+5=3/4n

Solution for 1/2n+5=3/4n equation:

1/2n+5=3/4n

We move all terms to the left:

1/2n+5-(3/4n)=0


Domain of the equation: 2n!=0

n!=0/2

n!=0

n∈R



Domain of the equation: 4n)!=0

n!=0/1

n!=0

n∈R


We add all the numbers together, and all the variables

1/2n-(+3/4n)+5=0

We get rid of parentheses

1/2n-3/4n+5=0

We calculate fractions


4n/8n^2+(-6n)/8n^2+5=0

We multiply all the terms by the denominator


4n+(-6n)+5*8n^2=0

Wy multiply elements

40n^2+4n+(-6n)=0

We get rid of parentheses

40n^2+4n-6n=0

We add all the numbers together, and all the variables

40n^2-2n=0

a = 40; b = -2; c = 0;
Δ = b2-4ac
Δ = -22-4·40·0
Δ = 4
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

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