-2g-9=21

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Solution for -2g-9=21 equation: 



-2g-9=21

We move all terms to the left:

-2g-9-(21)=0

We add all the numbers together, and all the variables

-2g-30=0

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

-2g=30

g=30/-2

g=-15

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