1/2x+1/3x=70

Solution for 1/2x+1/3x=70 equation:

1/2x+1/3x=70

We move all terms to the left:

1/2x+1/3x-(70)=0


Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R



Domain of the equation: 3x!=0

x!=0/3

x!=0

x∈R


We calculate fractions


3x/6x^2+2x/6x^2-70=0

We multiply all the terms by the denominator


3x+2x-70*6x^2=0

We add all the numbers together, and all the variables

5x-70*6x^2=0

Wy multiply elements

-420x^2+5x=0

a = -420; b = 5; c = 0;
Δ = b2-4ac
Δ = 52-4·(-420)·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*-420}=\frac{-10}{-840}
=1/84
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+5}{2*-420}=\frac{0}{-840}
=0
$