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(G)=20G+12
We move all terms to the left:
(G)-(20G+12)=0
We get rid of parentheses
G-20G-12=0
We add all the numbers together, and all the variables
-19G-12=0
We move all terms containing G to the left, all other terms to the right
-19G=12
G=12/-19
G=-12/19
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