3v-21=30

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Solution for 3v-21=30 equation: 


Simplifying
3v + -21 = 30

Reorder the terms:
-21 + 3v = 30

Solving
-21 + 3v = 30

Solving for variable 'v'.

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

Add '21' to each side of the equation.
-21 + 21 + 3v = 30 + 21

Combine like terms: -21 + 21 = 0
0 + 3v = 30 + 21
3v = 30 + 21

Combine like terms: 30 + 21 = 51
3v = 51

Divide each side by '3'.
v = 17

Simplifying
v = 17

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