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3.8g+5+2.7g=12.7
We move all terms to the left:
3.8g+5+2.7g-(12.7)=0
We add all the numbers together, and all the variables
6.5g-7.7=0
We move all terms containing g to the left, all other terms to the right
6.5g=7.7
g=7.7/6.5
g=1+1/5.4166666666667
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