2g+4=21

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Solution for 2g+4=21 equation: 


Simplifying
2g + 4 = 21

Reorder the terms:
4 + 2g = 21

Solving
4 + 2g = 21

Solving for variable 'g'.

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

Add '-4' to each side of the equation.
4 + -4 + 2g = 21 + -4

Combine like terms: 4 + -4 = 0
0 + 2g = 21 + -4
2g = 21 + -4

Combine like terms: 21 + -4 = 17
2g = 17

Divide each side by '2'.
g = 8.5

Simplifying
g = 8.5

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