1/4x-2=1/7x+1

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

1/4x-2=1/7x+1

We move all terms to the left:

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


Domain of the equation: 4x!=0

x!=0/4

x!=0

x∈R



Domain of the equation: 7x+1)!=0

x∈R


We get rid of parentheses

1/4x-1/7x-1-2=0

We calculate fractions


7x/28x^2+(-4x)/28x^2-1-2=0

We add all the numbers together, and all the variables

7x/28x^2+(-4x)/28x^2-3=0

We multiply all the terms by the denominator


7x+(-4x)-3*28x^2=0

Wy multiply elements

-84x^2+7x+(-4x)=0

We get rid of parentheses

-84x^2+7x-4x=0

We add all the numbers together, and all the variables

-84x^2+3x=0

a = -84; b = 3; c = 0;
Δ = b2-4ac
Δ = 32-4·(-84)·0
Δ = 9
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{9}=3$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(3)-3}{2*-84}=\frac{-6}{-168}
=1/28
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+3}{2*-84}=\frac{0}{-168}
=0
$