21g+7=21

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Solution for 21g+7=21 equation: 



21g+7=21

We move all terms to the left:

21g+7-(21)=0

We add all the numbers together, and all the variables

21g-14=0

We move all terms containing g to the left, all other terms to the right

21g=14

g=14/21

g=2/3

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