3.9g+9=1.9g+21

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Solution for 3.9g+9=1.9g+21 equation: 



3.9g+9=1.9g+21

We move all terms to the left:

3.9g+9-(1.9g+21)=0

We get rid of parentheses

3.9g-1.9g-21+9=0

We add all the numbers together, and all the variables

2g-12=0

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

2g=12

g=12/2

g=6

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