350=1/3x+2x

Solution for 350=1/3x+2x equation:

350=1/3x+2x

We move all terms to the left:

350-(1/3x+2x)=0


Domain of the equation: 3x+2x)!=0

x∈R


We add all the numbers together, and all the variables

-(+2x+1/3x)+350=0

We get rid of parentheses

-2x-1/3x+350=0

We multiply all the terms by the denominator


-2x*3x+350*3x-1=0

Wy multiply elements

-6x^2+1050x-1=0

a = -6; b = 1050; c = -1;
Δ = b2-4ac
Δ = 10502-4·(-6)·(-1)
Δ = 1102476
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:

$\sqrt{\Delta}=\sqrt{1102476}=\sqrt{4*275619}=\sqrt{4}*\sqrt{275619}=2\sqrt{275619}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1050)-2\sqrt{275619}}{2*-6}=\frac{-1050-2\sqrt{275619}}{-12}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1050)+2\sqrt{275619}}{2*-6}=\frac{-1050+2\sqrt{275619}}{-12}
$