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

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

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

We move all terms to the left:

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


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

x∈R


We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We multiply all the terms by the denominator


2x*x-7*x+1*x-3=0

We add all the numbers together, and all the variables

-6x+2x*x-3=0

Wy multiply elements

2x^2-6x-3=0

a = 2; b = -6; c = -3;
Δ = b2-4ac
Δ = -62-4·2·(-3)
Δ = 60
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{60}=\sqrt{4*15}=\sqrt{4}*\sqrt{15}=2\sqrt{15}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-6)-2\sqrt{15}}{2*2}=\frac{6-2\sqrt{15}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-6)+2\sqrt{15}}{2*2}=\frac{6+2\sqrt{15}}{4}
$