3/4x+7=1/8x+2

Solution for 3/4x+7=1/8x+2 equation:

3/4x+7=1/8x+2

We move all terms to the left:

3/4x+7-(1/8x+2)=0


Domain of the equation: 4x!=0

x!=0/4

x!=0

x∈R



Domain of the equation: 8x+2)!=0

x∈R


We get rid of parentheses

3/4x-1/8x-2+7=0

We calculate fractions


24x/32x^2+(-4x)/32x^2-2+7=0

We add all the numbers together, and all the variables

24x/32x^2+(-4x)/32x^2+5=0

We multiply all the terms by the denominator


24x+(-4x)+5*32x^2=0

Wy multiply elements

160x^2+24x+(-4x)=0

We get rid of parentheses

160x^2+24x-4x=0

We add all the numbers together, and all the variables

160x^2+20x=0

a = 160; b = 20; c = 0;
Δ = b2-4ac
Δ = 202-4·160·0
Δ = 400
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{400}=20$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(20)-20}{2*160}=\frac{-40}{320}
=-1/8
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(20)+20}{2*160}=\frac{0}{320}
=0
$