1/2x+2/x=7

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

1/2x+2/x=7

We move all terms to the left:

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


Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R



Domain of the equation: x!=0

x∈R


We calculate fractions


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

We multiply all the terms by the denominator


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

We add all the numbers together, and all the variables

5x-7*2x^2=0

Wy multiply elements

-14x^2+5x=0

a = -14; b = 5; c = 0;
Δ = b2-4ac
Δ = 52-4·(-14)·0
Δ = 25
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{25}=5$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-5}{2*-14}=\frac{-10}{-28}
=5/14
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+5}{2*-14}=\frac{0}{-28}
=0
$