3v(v-21)=0

Solution for 3v(v-21)=0 equation:

Simplifying
3v(v + -21) = 0

Reorder the terms:
3v(-21 + v) = 0
(-21 * 3v + v * 3v) = 0
(-63v + 3v2) = 0

Solving
-63v + 3v2 = 0

Solving for variable 'v'.

Factor out the Greatest Common Factor (GCF), '3v'.
3v(-21 + v) = 0

Ignore the factor 3.
Subproblem 1
Set the factor 'v' equal to zero and attempt to solve:

Simplifying
v = 0

Solving
v = 0

Move all terms containing v to the left, all other terms to the right.

Simplifying
v = 0
Subproblem 2
Set the factor '(-21 + v)' equal to zero and attempt to solve:

Simplifying
-21 + v = 0

Solving
-21 + v = 0

Move all terms containing v to the left, all other terms to the right.

Add '21' to each side of the equation.
-21 + 21 + v = 0 + 21

Combine like terms: -21 + 21 = 0
0 + v = 0 + 21
v = 0 + 21

Combine like terms: 0 + 21 = 21
v = 21

Simplifying
v = 21
Solution
v = {0, 21}