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-0.28G-0.09G=699.3
We move all terms to the left:
-0.28G-0.09G-(699.3)=0
We add all the numbers together, and all the variables
-0.37G-699.3=0
We move all terms containing G to the left, all other terms to the right
-0.37G=699.3
G=699.3/-0.37
G=-1890
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