12-1/4x-15=-18-1/2x

Solution for 12-1/4x-15=-18-1/2x equation:

12-1/4x-15=-18-1/2x

We move all terms to the left:

12-1/4x-15-(-18-1/2x)=0


Domain of the equation: 4x!=0

x!=0/4

x!=0

x∈R



Domain of the equation: 2x)!=0

x!=0/1

x!=0

x∈R


We add all the numbers together, and all the variables

-1/4x-(-1/2x-18)+12-15=0

We add all the numbers together, and all the variables

-1/4x-(-1/2x-18)-3=0

We get rid of parentheses

-1/4x+1/2x+18-3=0

We calculate fractions


(-2x)/8x^2+4x/8x^2+18-3=0

We add all the numbers together, and all the variables

(-2x)/8x^2+4x/8x^2+15=0

We multiply all the terms by the denominator


(-2x)+4x+15*8x^2=0

We add all the numbers together, and all the variables

4x+(-2x)+15*8x^2=0

Wy multiply elements

120x^2+4x+(-2x)=0

We get rid of parentheses

120x^2+4x-2x=0

We add all the numbers together, and all the variables

120x^2+2x=0

a = 120; b = 2; c = 0;
Δ = b2-4ac
Δ = 22-4·120·0
Δ = 4
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{4}=2$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-2}{2*120}=\frac{-4}{240}
=-1/60
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+2}{2*120}=\frac{0}{240}
=0
$