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12.9=2g+3.55
We move all terms to the left:
12.9-(2g+3.55)=0
We get rid of parentheses
-2g-3.55+12.9=0
We add all the numbers together, and all the variables
-2g+9.35=0
We move all terms containing g to the left, all other terms to the right
-2g=-9.35
g=-9.35/-2
g=4+1/1.4814814814815
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