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2.50g+3=15.5
We move all terms to the left:
2.50g+3-(15.5)=0
We add all the numbers together, and all the variables
2.50g-12.5=0
We move all terms containing g to the left, all other terms to the right
2.50g=12.5
g=12.5/2.50
g=5
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