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-54=8g+18
We move all terms to the left:
-54-(8g+18)=0
We get rid of parentheses
-8g-18-54=0
We add all the numbers together, and all the variables
-8g-72=0
We move all terms containing g to the left, all other terms to the right
-8g=72
g=72/-8
g=-9
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