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-8g+20=-2g+4g
We move all terms to the left:
-8g+20-(-2g+4g)=0
We add all the numbers together, and all the variables
-8g-(+2g)+20=0
We get rid of parentheses
-8g-2g+20=0
We add all the numbers together, and all the variables
-10g+20=0
We move all terms containing g to the left, all other terms to the right
-10g=-20
g=-20/-10
g=+2
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