3G-21=

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Solution for 3G-21= equation: 


Simplifying
3G + -21 = 0

Reorder the terms:
-21 + 3G = 0

Solving
-21 + 3G = 0

Solving for variable 'G'.

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

Add '21' to each side of the equation.
-21 + 21 + 3G = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 3G = 0 + 21
3G = 0 + 21

Combine like terms: 0 + 21 = 21
3G = 21

Divide each side by '3'.
G = 7

Simplifying
G = 7

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