31/2x+6=21/4x+5

Solution for 31/2x+6=21/4x+5 equation:

31/2x+6=21/4x+5

We move all terms to the left:

31/2x+6-(21/4x+5)=0


Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R



Domain of the equation: 4x+5)!=0

x∈R


We get rid of parentheses

31/2x-21/4x-5+6=0

We calculate fractions


124x/8x^2+(-42x)/8x^2-5+6=0

We add all the numbers together, and all the variables

124x/8x^2+(-42x)/8x^2+1=0

We multiply all the terms by the denominator


124x+(-42x)+1*8x^2=0

Wy multiply elements

8x^2+124x+(-42x)=0

We get rid of parentheses

8x^2+124x-42x=0

We add all the numbers together, and all the variables

8x^2+82x=0

a = 8; b = 82; c = 0;
Δ = b2-4ac
Δ = 822-4·8·0
Δ = 6724
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{6724}=82$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(82)-82}{2*8}=\frac{-164}{16}
=-10+1/4
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(82)+82}{2*8}=\frac{0}{16}
=0
$