X-1/3x=-10

Solution for X-1/3x=-10 equation:

X-1/3X=-10

We move all terms to the left:

X-1/3X-(-10)=0


Domain of the equation: 3X!=0

X!=0/3

X!=0

X∈R


We add all the numbers together, and all the variables

X-1/3X+10=0

We multiply all the terms by the denominator


X*3X+10*3X-1=0

Wy multiply elements

3X^2+30X-1=0

a = 3; b = 30; c = -1;
Δ = b2-4ac
Δ = 302-4·3·(-1)
Δ = 912
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:

$\sqrt{\Delta}=\sqrt{912}=\sqrt{16*57}=\sqrt{16}*\sqrt{57}=4\sqrt{57}$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(30)-4\sqrt{57}}{2*3}=\frac{-30-4\sqrt{57}}{6}
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(30)+4\sqrt{57}}{2*3}=\frac{-30+4\sqrt{57}}{6}
$