7g-4g+2=20

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Solution for 7g-4g+2=20 equation: 



7g-4g+2=20

We move all terms to the left:

7g-4g+2-(20)=0

We add all the numbers together, and all the variables

3g-18=0

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

3g=18

g=18/3

g=6

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