(7/3)w=21

Solution for (7/3)w=21 equation:

(7/3)w=21

We move all terms to the left:

(7/3)w-(21)=0


Domain of the equation: 3)w!=0

w!=0/1

w!=0

w∈R


We add all the numbers together, and all the variables

(+7/3)w-21=0

We multiply parentheses

7w^2-21=0

a = 7; b = 0; c = -21;
Δ = b2-4ac
Δ = 02-4·7·(-21)
Δ = 588
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$w_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$w_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{588}=\sqrt{196*3}=\sqrt{196}*\sqrt{3}=14\sqrt{3}$
$w_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-14\sqrt{3}}{2*7}=\frac{0-14\sqrt{3}}{14}
=-\frac{14\sqrt{3}}{14}
=-\sqrt{3}
$
$w_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+14\sqrt{3}}{2*7}=\frac{0+14\sqrt{3}}{14}
=\frac{14\sqrt{3}}{14}
=\sqrt{3}
$