(2/5)x+x=56

Solution for (2/5)x+x=56 equation:

(2/5)x+x=56

We move all terms to the left:

(2/5)x+x-(56)=0


Domain of the equation: 5)x!=0

x!=0/1

x!=0

x∈R


We add all the numbers together, and all the variables

(+2/5)x+x-56=0

We add all the numbers together, and all the variables

x+(+2/5)x-56=0

We multiply parentheses

2x^2+x-56=0

a = 2; b = 1; c = -56;
Δ = b2-4ac
Δ = 12-4·2·(-56)
Δ = 449
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-\sqrt{449}}{2*2}=\frac{-1-\sqrt{449}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{449}}{2*2}=\frac{-1+\sqrt{449}}{4}
$