(42/x)+x=2x-1

Solution for (42/x)+x=2x-1 equation:

(42/x)+x=2x-1

We move all terms to the left:

(42/x)+x-(2x-1)=0


Domain of the equation: x)!=0

x!=0/1

x!=0

x∈R


We add all the numbers together, and all the variables

(+42/x)+x-(2x-1)=0

We add all the numbers together, and all the variables

x+(+42/x)-(2x-1)=0

We get rid of parentheses

x+42/x-2x+1=0

We multiply all the terms by the denominator


x*x-2x*x+1*x+42=0

We add all the numbers together, and all the variables

x+x*x-2x*x+42=0

Wy multiply elements

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

We add all the numbers together, and all the variables

-1x^2+x+42=0

a = -1; b = 1; c = +42;
Δ = b2-4ac
Δ = 12-4·(-1)·42
Δ = 169
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{169}=13$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-13}{2*-1}=\frac{-14}{-2}
=+7
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+13}{2*-1}=\frac{12}{-2}
=-6
$